69766241689 has 3 divisors (see below), whose sum is σ = 69766505823. Its totient is φ = 69765977556.

The previous prime is 69766241681. The next prime is 69766241719. The reversal of 69766241689 is 98614266796.

It is a happy number.

The square root of 69766241689 is 264133.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 53766015625 + 16000226064 = 231875^2 + 126492^2 .

It is not a de Polignac number, because 69766241689 - 2³ = 69766241681 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 69766241689.

It is not an unprimeable number, because it can be changed into a prime (69766241681) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 132067 + ... + 396199.

It is an arithmetic number, because the mean of its divisors is an integer number (23255501941).

Almost surely, 2^69766241689 is an apocalyptic number.

69766241689 is the 264133-rd square number.

69766241689 is the 132067-th centered octagonal number.

It is an amenable number.

69766241689 is a deficient number, since it is larger than the sum of its proper divisors (264134).

69766241689 is an frugal number, since it uses more digits than its factorization.

69766241689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528266 (or 264133 counting only the distinct ones).

The product of its digits is 47029248, while the sum is 64.

Multiplying 69766241689 by its sum of digits (64), we get a square (4465039468096 = 2113064²).

The spelling of 69766241689 in words is "sixty-nine billion, seven hundred sixty-six million, two hundred forty-one thousand, six hundred eighty-nine".