8661495672 has 64 divisors (see below), whose sum is σ = 24646557600. Its totient is φ = 2816743680.

The previous prime is 8661495637. The next prime is 8661495707. The reversal of 8661495672 is 2765941668.

8661495672 is a `hidden beast` number, since 8 + 66 + 14 + 9 + 567 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (8661495637) and next prime (8661495707).

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 480163 + ... + 497874.

Almost surely, 2^8661495672 is an apocalyptic number.

8661495672 is a gapful number since it is divisible by the number (82) formed by its first and last digit.

It is an amenable number.

8661495672 is an abundant number, since it is smaller than the sum of its proper divisors (15985061928).

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

8661495672 is a wasteful number, since it uses less digits than its factorization.

8661495672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978093 (or 978083 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The square root of 8661495672 is about 93067.1567847648. The cubic root of 8661495672 is about 2053.6714434744.

The spelling of 8661495672 in words is "eight billion, six hundred sixty-one million, four hundred ninety-five thousand, six hundred seventy-two".