66476665420 has 24 divisors (see below), whose sum is σ = 152291997648. Its totient is φ = 24173332800.

The previous prime is 66476665417. The next prime is 66476665427. The reversal of 66476665420 is 2456667466.

It is not an unprimeable number, because it can be changed into a prime (66476665427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151083111 + ... + 151083550.

It is an arithmetic number, because the mean of its divisors is an integer number (6345499902).

Almost surely, 2^66476665420 is an apocalyptic number.

It is an amenable number.

66476665420 is an abundant number, since it is smaller than the sum of its proper divisors (85815332228).

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

66476665420 is a wasteful number, since it uses less digits than its factorization.

66476665420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302166681 (or 302166679 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 52.

The spelling of 66476665420 in words is "sixty-six billion, four hundred seventy-six million, six hundred sixty-five thousand, four hundred twenty".