69640668 has 48 divisors (see below), whose sum is σ = 181888000. Its totient is φ = 23041584.

The previous prime is 69640639. The next prime is 69640679. The reversal of 69640668 is 86604696.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12693 + ... + 17331.

Almost surely, 2^69640668 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 69640668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90944000).

69640668 is an abundant number, since it is smaller than the sum of its proper divisors (112247332).

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

69640668 is a wasteful number, since it uses less digits than its factorization.

69640668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4791 (or 4783 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The square root of 69640668 is about 8345.0984416003. The cubic root of 69640668 is about 411.4221247750.

The spelling of 69640668 in words is "sixty-nine million, six hundred forty thousand, six hundred sixty-eight".