8661227904 has 96 divisors (see below), whose sum is σ = 28484124240. Its totient is φ = 2474634240.

The previous prime is 8661227891. The next prime is 8661227929. The reversal of 8661227904 is 4097221668.

It is a happy number.

8661227904 is a `hidden beast` number, since 8 + 6 + 612 + 27 + 9 + 0 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a self number, because there is not a number n which added to its sum of digits gives 8661227904.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 528967 + ... + 545094.

Almost surely, 2^8661227904 is an apocalyptic number.

8661227904 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

8661227904 is an abundant number, since it is smaller than the sum of its proper divisors (19822896336).

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

8661227904 is a wasteful number, since it uses less digits than its factorization.

8661227904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074088 (or 1074073 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 8661227904 is about 93065.7181995605. The cubic root of 8661227904 is about 2053.6502803411.

The spelling of 8661227904 in words is "eight billion, six hundred sixty-one million, two hundred twenty-seven thousand, nine hundred four".