66707400400 has 60 divisors (see below), whose sum is σ = 160970759712. Its totient is φ = 26565377920.

The previous prime is 66707400379. The next prime is 66707400413. The reversal of 66707400400 is 400470766.

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, 276532 + ... + 458131.

Almost surely, 2^66707400400 is an apocalyptic number.

It is an amenable number.

66707400400 is an abundant number, since it is smaller than the sum of its proper divisors (94263359312).

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

66707400400 is a wasteful number, since it uses less digits than its factorization.

66707400400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734908 (or 734897 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 34.

The spelling of 66707400400 in words is "sixty-six billion, seven hundred seven million, four hundred thousand, four hundred".