8919660465 has 20 divisors (see below), whose sum is σ = 15989318004. Its totient is φ = 4757152032.

The previous prime is 8919660433. The next prime is 8919660479. The reversal of 8919660465 is 5640669198.

It is a happy number.

8919660465 is a `hidden beast` number, since 8 + 91 + 96 + 6 + 0 + 465 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5757622641 + 3162037824 = 75879^2 + 56232^2 .

It is not a de Polignac number, because 8919660465 - 2⁵ = 8919660433 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11011522 + ... + 11012331.

Almost surely, 2^8919660465 is an apocalyptic number.

It is an amenable number.

8919660465 is a deficient number, since it is larger than the sum of its proper divisors (7069657539).

8919660465 is a wasteful number, since it uses less digits than its factorization.

8919660465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22023870 (or 22023861 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 54.

The square root of 8919660465 is about 94443.9540944787. The cubic root of 8919660465 is about 2073.8759453149.

The spelling of 8919660465 in words is "eight billion, nine hundred nineteen million, six hundred sixty thousand, four hundred sixty-five".