85668644 has 48 divisors (see below), whose sum is σ = 169989120. Its totient is φ = 37532160.

The previous prime is 85668613. The next prime is 85668673. The reversal of 85668644 is 44686658.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78269 + ... + 79355.

It is an arithmetic number, because the mean of its divisors is an integer number (3541440).

Almost surely, 2^85668644 is an apocalyptic number.

It is an amenable number.

85668644 is a deficient number, since it is larger than the sum of its proper divisors (84320476).

85668644 is a wasteful number, since it uses less digits than its factorization.

85668644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1188 (or 1186 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 47.

The square root of 85668644 is about 9255.7357352077. The cubic root of 85668644 is about 440.8328646461.

The spelling of 85668644 in words is "eighty-five million, six hundred sixty-eight thousand, six hundred forty-four".