66807400674 has 32 divisors (see below), whose sum is σ = 152940917376. Its totient is φ = 19058042880.

The previous prime is 66807400669. The next prime is 66807400687. The reversal of 66807400674 is 47600470866.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1213837 + ... + 1267680.

It is an arithmetic number, because the mean of its divisors is an integer number (4779403668).

Almost surely, 2^66807400674 is an apocalyptic number.

66807400674 is an abundant number, since it is smaller than the sum of its proper divisors (86133516702).

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

66807400674 is a wasteful number, since it uses less digits than its factorization.

66807400674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2482170.

The product of its (nonzero) digits is 1354752, while the sum is 48.

The spelling of 66807400674 in words is "sixty-six billion, eight hundred seven million, four hundred thousand, six hundred seventy-four".