66476245920 has 144 divisors (see below), whose sum is σ = 243588044448. Its totient is φ = 15194565120.

The previous prime is 66476245909. The next prime is 66476245933. The reversal of 66476245920 is 2954267466.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1389666 + ... + 1436705.

It is an arithmetic number, because the mean of its divisors is an integer number (1691583642).

Almost surely, 2^66476245920 is an apocalyptic number.

66476245920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66476245920 is an abundant number, since it is smaller than the sum of its proper divisors (177111798528).

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

66476245920 is a wasteful number, since it uses less digits than its factorization.

66476245920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2826403 (or 2826388 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 51.

The spelling of 66476245920 in words is "sixty-six billion, four hundred seventy-six million, two hundred forty-five thousand, nine hundred twenty".