66801400814 has 32 divisors (see below), whose sum is σ = 101914509312. Its totient is φ = 32836104000.

The previous prime is 66801400751. The next prime is 66801400823. The reversal of 66801400814 is 41800410866.

It is a congruent 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, 13144754 + ... + 13149834.

It is an arithmetic number, because the mean of its divisors is an integer number (3184828416).

Almost surely, 2^66801400814 is an apocalyptic number.

66801400814 is a deficient number, since it is larger than the sum of its proper divisors (35113108498).

66801400814 is a wasteful number, since it uses less digits than its factorization.

66801400814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5672.

The product of its (nonzero) digits is 36864, while the sum is 38.

The spelling of 66801400814 in words is "sixty-six billion, eight hundred one million, four hundred thousand, eight hundred fourteen".