97666866679 has 4 divisors (see below), whose sum is σ = 98251698384. Its totient is φ = 97082034976.

The previous prime is 97666866677. The next prime is 97666866691.

97666866679 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 97666866679 - 2¹ = 97666866677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97666866673) 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, 292415602 + ... + 292415935.

It is an arithmetic number, because the mean of its divisors is an integer number (24562924596).

Almost surely, 2^97666866679 is an apocalyptic number.

97666866679 is a deficient number, since it is larger than the sum of its proper divisors (584831705).

97666866679 is a wasteful number, since it uses less digits than its factorization.

97666866679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584831704.

The product of its digits is 1481421312, while the sum is 76.

The spelling of 97666866679 in words is "ninety-seven billion, six hundred sixty-six million, eight hundred sixty-six thousand, six hundred seventy-nine".