97666717977 has 8 divisors (see below), whose sum is σ = 144691434080. Its totient is φ = 65111145300.

The previous prime is 97666717937. The next prime is 97666718033. The reversal of 97666717977 is 77971766679.

It is not a de Polignac number, because 97666717977 - 2⁶ = 97666717913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97666717937) 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, 1808642899 + ... + 1808642952.

It is an arithmetic number, because the mean of its divisors is an integer number (18086429260).

Almost surely, 2^97666717977 is an apocalyptic number.

It is an amenable number.

97666717977 is a deficient number, since it is larger than the sum of its proper divisors (47024716103).

97666717977 is a wasteful number, since it uses less digits than its factorization.

97666717977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3617285860 (or 3617285854 counting only the distinct ones).

The product of its digits is 294055272, while the sum is 72.

The spelling of 97666717977 in words is "ninety-seven billion, six hundred sixty-six million, seven hundred seventeen thousand, nine hundred seventy-seven".