97666816 has 36 divisors (see below), whose sum is σ = 209955592. Its totient is φ = 45075456.

The previous prime is 97666813. The next prime is 97666817. The reversal of 97666816 is 61866679.

It is a self number, because there is not a number n which added to its sum of digits gives 97666816.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97666813) 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, 11346 + ... + 18001.

Almost surely, 2^97666816 is an apocalyptic number.

It is an amenable number.

97666816 is an abundant number, since it is smaller than the sum of its proper divisors (112288776).

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

97666816 is a wasteful number, since it uses less digits than its factorization.

97666816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29376 (or 29362 counting only the distinct ones).

The product of its digits is 653184, while the sum is 49.

The square root of 97666816 is about 9882.6522755787. The cubic root of 97666816 is about 460.5205449345.

The spelling of 97666816 in words is "ninety-seven million, six hundred sixty-six thousand, eight hundred sixteen".