97666655 has 4 divisors (see below), whose sum is σ = 117199992. Its totient is φ = 78133320.

The previous prime is 97666601. The next prime is 97666703. The reversal of 97666655 is 55666679.

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

It is not a de Polignac number, because 97666655 - 2¹⁴ = 97650271 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9766661 + ... + 9766670.

It is an arithmetic number, because the mean of its divisors is an integer number (29299998).

Almost surely, 2^97666655 is an apocalyptic number.

97666655 is a deficient number, since it is larger than the sum of its proper divisors (19533337).

97666655 is a wasteful number, since it uses less digits than its factorization.

97666655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19533336.

The product of its digits is 2041200, while the sum is 50.

The square root of 97666655 is about 9882.6441299887. The cubic root of 97666655 is about 460.5202918843.

The spelling of 97666655 in words is "ninety-seven million, six hundred sixty-six thousand, six hundred fifty-five".