672166307418 has 64 divisors (see below), whose sum is σ = 1441475481600. Its totient is φ = 208202717952.

The previous prime is 672166307389. The next prime is 672166307419. The reversal of 672166307418 is 814703661276.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (672166307419) 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 31 ways as a sum of consecutive naturals, for example, 13749783 + ... + 13798581.

It is an arithmetic number, because the mean of its divisors is an integer number (22523054400).

Almost surely, 2^672166307418 is an apocalyptic number.

672166307418 is an abundant number, since it is smaller than the sum of its proper divisors (769309174182).

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

672166307418 is a wasteful number, since it uses less digits than its factorization.

672166307418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50531.

The product of its (nonzero) digits is 2032128, while the sum is 51.

The spelling of 672166307418 in words is "six hundred seventy-two billion, one hundred sixty-six million, three hundred seven thousand, four hundred eighteen".