97666679 has 4 divisors (see below), whose sum is σ = 106545480. Its totient is φ = 88787880.

The previous prime is 97666601. The next prime is 97666703.

It is a happy number.

97666679 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 a de Polignac number, because none of the positive numbers 2^k-97666679 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 (97666279) 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, 4439384 + ... + 4439405.

It is an arithmetic number, because the mean of its divisors is an integer number (26636370).

Almost surely, 2^97666679 is an apocalyptic number.

97666679 is a deficient number, since it is larger than the sum of its proper divisors (8878801).

97666679 is a wasteful number, since it uses less digits than its factorization.

97666679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8878800.

The product of its digits is 5143824, while the sum is 56.

The square root of 97666679 is about 9882.6453442386. The cubic root of 97666679 is about 460.5203296061.

The spelling of 97666679 in words is "ninety-seven million, six hundred sixty-six thousand, six hundred seventy-nine".