69995661 has 4 divisors (see below), whose sum is σ = 93327552. Its totient is φ = 46663772.

The previous prime is 69995657. The next prime is 69995671. The reversal of 69995661 is 16659996.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 69995661 - 2² = 69995657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69995671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11665941 + ... + 11665946.

It is an arithmetic number, because the mean of its divisors is an integer number (23331888).

Almost surely, 2^69995661 is an apocalyptic number.

It is an amenable number.

69995661 is a deficient number, since it is larger than the sum of its proper divisors (23331891).

69995661 is a wasteful number, since it uses less digits than its factorization.

69995661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23331890.

The product of its digits is 787320, while the sum is 51.

The square root of 69995661 is about 8366.3409564755. The cubic root of 69995661 is about 412.1200144445.

The spelling of 69995661 in words is "sixty-nine million, nine hundred ninety-five thousand, six hundred sixty-one".