66738010801400 has 24 divisors (see below), whose sum is σ = 155165875113720. Its totient is φ = 26695204320480.

The previous prime is 66738010801349. The next prime is 66738010801411. The reversal of 66738010801400 is 410801083766.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 166845026804 + ... + 166845027203.

It is an arithmetic number, because the mean of its divisors is an integer number (6465244796405).

Almost surely, 2^{66738010801400} is an apocalyptic number.

It is an amenable number.

66738010801400 is an abundant number, since it is smaller than the sum of its proper divisors (88427864312320).

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

66738010801400 is a wasteful number, since it uses less digits than its factorization.

66738010801400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333690054023 (or 333690054014 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 44.

The spelling of 66738010801400 in words is "sixty-six trillion, seven hundred thirty-eight billion, ten million, eight hundred one thousand, four hundred".