65640696 has 32 divisors (see below), whose sum is σ = 179020800. Its totient is φ = 19891040.

The previous prime is 65640691. The next prime is 65640709. The reversal of 65640696 is 69604656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65640691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124056 + ... + 124583.

It is an arithmetic number, because the mean of its divisors is an integer number (5594400).

Almost surely, 2^65640696 is an apocalyptic number.

65640696 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

65640696 is an abundant number, since it is smaller than the sum of its proper divisors (113380104).

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

65640696 is a wasteful number, since it uses less digits than its factorization.

65640696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248659 (or 248655 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 42.

The square root of 65640696 is about 8101.8945932418. The cubic root of 65640696 is about 403.3893168805.

The spelling of 65640696 in words is "sixty-five million, six hundred forty thousand, six hundred ninety-six".