86691670 has 32 divisors (see below), whose sum is σ = 177938208. Its totient is φ = 30125568.

The previous prime is 86691637. The next prime is 86691691. The reversal of 86691670 is 7619668.

It is a congruent 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, 17404 + ... + 21823.

It is an arithmetic number, because the mean of its divisors is an integer number (5560569).

Almost surely, 2^86691670 is an apocalyptic number.

86691670 is an abundant number, since it is smaller than the sum of its proper divisors (91246538).

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

86691670 is a wasteful number, since it uses less digits than its factorization.

86691670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39264.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 86691670 is about 9310.8361600879. The cubic root of 86691670 is about 442.5806847456.

The spelling of 86691670 in words is "eighty-six million, six hundred ninety-one thousand, six hundred seventy".