85766978 has 40 divisors (see below), whose sum is σ = 147843900. Its totient is φ = 37268000.

The previous prime is 85766959. The next prime is 85767001. The reversal of 85766978 is 87966758.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 78021889 + 7745089 = 8833^2 + 2783^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 849128 + ... + 849228.

Almost surely, 2^85766978 is an apocalyptic number.

85766978 is a deficient number, since it is larger than the sum of its proper divisors (62076922).

85766978 is a wasteful number, since it uses less digits than its factorization.

85766978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176 (or 143 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 56.

The square root of 85766978 is about 9261.0462691858. The cubic root of 85766978 is about 441.0014688618.

The spelling of 85766978 in words is "eighty-five million, seven hundred sixty-six thousand, nine hundred seventy-eight".