97666631 has 16 divisors (see below), whose sum is σ = 105959040. Its totient is φ = 89722080.

The previous prime is 97666601. The next prime is 97666703. The reversal of 97666631 is 13666679.

It is not a de Polignac number, because 97666631 - 2⁶ = 97666567 is a prime.

It is a super-2 number, since 2×97666631² = 19077541621780322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97666601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140996 + ... + 141686.

It is an arithmetic number, because the mean of its divisors is an integer number (6622440).

Almost surely, 2^97666631 is an apocalyptic number.

97666631 is a deficient number, since it is larger than the sum of its proper divisors (8292409).

97666631 is a wasteful number, since it uses less digits than its factorization.

97666631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926.

The product of its digits is 244944, while the sum is 44.

The square root of 97666631 is about 9882.6429157387. The cubic root of 97666631 is about 460.5202541624.

The spelling of 97666631 in words is "ninety-seven million, six hundred sixty-six thousand, six hundred thirty-one".