97665780 has 24 divisors (see below), whose sum is σ = 273464352. Its totient is φ = 26044192.

The previous prime is 97665773. The next prime is 97665791. The reversal of 97665780 is 8756679.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 813822 + ... + 813941.

It is an arithmetic number, because the mean of its divisors is an integer number (11394348).

Almost surely, 2^97665780 is an apocalyptic number.

It is an amenable number.

97665780 is an abundant number, since it is smaller than the sum of its proper divisors (175798572).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

97665780 is a wasteful number, since it uses less digits than its factorization.

97665780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1627775 (or 1627773 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 48.

The square root of 97665780 is about 9882.5998603606. The cubic root of 97665780 is about 460.5189166061.

The spelling of 97665780 in words is "ninety-seven million, six hundred sixty-five thousand, seven hundred eighty".