86665388 has 48 divisors (see below), whose sum is σ = 165745440. Its totient is φ = 39496704.

The previous prime is 86665387. The next prime is 86665417. The reversal of 86665388 is 88356668.

Its product of digits (1658880) is a multiple of the sum of its prime divisors (384).

It is not an unprimeable number, because it can be changed into a prime (86665387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 500870 + ... + 501042.

It is an arithmetic number, because the mean of its divisors is an integer number (3453030).

Almost surely, 2^86665388 is an apocalyptic number.

It is an amenable number.

86665388 is a deficient number, since it is larger than the sum of its proper divisors (79080052).

86665388 is a wasteful number, since it uses less digits than its factorization.

86665388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386 (or 384 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 50.

The square root of 86665388 is about 9309.4246868429. The cubic root of 86665388 is about 442.5359550301.

The spelling of 86665388 in words is "eighty-six million, six hundred sixty-five thousand, three hundred eighty-eight".