66325964409 has 96 divisors (see below), whose sum is σ = 109369128960. Its totient is φ = 38550758400.

The previous prime is 66325964407. The next prime is 66325964431. The reversal of 66325964409 is 90446952366.

66325964409 is a `hidden beast` number, since 6 + 6 + 3 + 2 + 596 + 4 + 40 + 9 = 666.

It is not a de Polignac number, because 66325964409 - 2¹ = 66325964407 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (66325964407) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 7625467 + ... + 7634159.

It is an arithmetic number, because the mean of its divisors is an integer number (1139261760).

Almost surely, 2^66325964409 is an apocalyptic number.

66325964409 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

It is an amenable number.

66325964409 is a deficient number, since it is larger than the sum of its proper divisors (43043164551).

66325964409 is a wasteful number, since it uses less digits than its factorization.

66325964409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8823 (or 8820 counting only the distinct ones).

The product of its (nonzero) digits is 8398080, while the sum is 54.

The spelling of 66325964409 in words is "sixty-six billion, three hundred twenty-five million, nine hundred sixty-four thousand, four hundred nine".