66930173908 has 144 divisors (see below), whose sum is σ = 139189155840. Its totient is φ = 28038441600.

The previous prime is 66930173897. The next prime is 66930173909. The reversal of 66930173908 is 80937103966.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66930173909) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 42602763 + ... + 42604333.

It is an arithmetic number, because the mean of its divisors is an integer number (966591360).

Almost surely, 2^66930173908 is an apocalyptic number.

It is an amenable number.

66930173908 is an abundant number, since it is smaller than the sum of its proper divisors (72258981932).

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

66930173908 is a wasteful number, since it uses less digits than its factorization.

66930173908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1758 (or 1743 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 52.

The spelling of 66930173908 in words is "sixty-six billion, nine hundred thirty million, one hundred seventy-three thousand, nine hundred eight".