8664415986 has 16 divisors (see below), whose sum is σ = 18240876000. Its totient is φ = 2736131328.

The previous prime is 8664415973. The next prime is 8664415987. The reversal of 8664415986 is 6895144668.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (8664415987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38001711 + ... + 38001938.

It is an arithmetic number, because the mean of its divisors is an integer number (1140054750).

Almost surely, 2^8664415986 is an apocalyptic number.

8664415986 is an abundant number, since it is smaller than the sum of its proper divisors (9576460014).

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

8664415986 is a wasteful number, since it uses less digits than its factorization.

8664415986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76003673.

The product of its digits is 9953280, while the sum is 57.

The square root of 8664415986 is about 93082.8447459574. The cubic root of 8664415986 is about 2053.9022231532.

The spelling of 8664415986 in words is "eight billion, six hundred sixty-four million, four hundred fifteen thousand, nine hundred eighty-six".