66733403670 has 24 divisors (see below), whose sum is σ = 173506849776. Its totient is φ = 17795574288.

The previous prime is 66733403591. The next prime is 66733403687. The reversal of 66733403670 is 7630433766.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 370741042 + ... + 370741221.

It is an arithmetic number, because the mean of its divisors is an integer number (7229452074).

Almost surely, 2^66733403670 is an apocalyptic number.

66733403670 is an abundant number, since it is smaller than the sum of its proper divisors (106773446106).

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

66733403670 is a wasteful number, since it uses less digits than its factorization.

66733403670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741482276 (or 741482273 counting only the distinct ones).

The product of its (nonzero) digits is 1143072, while the sum is 45.

The spelling of 66733403670 in words is "sixty-six billion, seven hundred thirty-three million, four hundred three thousand, six hundred seventy".