86661992 has 16 divisors (see below), whose sum is σ = 166883460. Its totient is φ = 42159744.

The previous prime is 86661989. The next prime is 86662057. The reversal of 86661992 is 29916668.

It can be written as a sum of positive squares in 2 ways, for example, as 71808676 + 14853316 = 8474^2 + 3854^2 .

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 3 ways as a sum of consecutive naturals, for example, 146093 + ... + 146684.

Almost surely, 2^86661992 is an apocalyptic number.

It is an amenable number.

86661992 is a deficient number, since it is larger than the sum of its proper divisors (80221468).

86661992 is a wasteful number, since it uses less digits than its factorization.

86661992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292820 (or 292816 counting only the distinct ones).

The product of its digits is 279936, while the sum is 47.

The square root of 86661992 is about 9309.2422892521. The cubic root of 86661992 is about 442.5301746689.

The spelling of 86661992 in words is "eighty-six million, six hundred sixty-one thousand, nine hundred ninety-two".