69081680 has 20 divisors (see below), whose sum is σ = 160615092. Its totient is φ = 27632640.

The previous prime is 69081667. The next prime is 69081689. The reversal of 69081680 is 8618096.

It can be written as a sum of positive squares in 2 ways, for example, as 28987456 + 40094224 = 5384^2 + 6332^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69081689) 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, 431681 + ... + 431840.

Almost surely, 2^69081680 is an apocalyptic number.

It is an amenable number.

69081680 is an abundant number, since it is smaller than the sum of its proper divisors (91533412).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

69081680 is a wasteful number, since it uses less digits than its factorization.

69081680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863534 (or 863528 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 69081680 is about 8311.5389670024. The cubic root of 69081680 is about 410.3183725829.

The spelling of 69081680 in words is "sixty-nine million, eighty-one thousand, six hundred eighty".