66639407614 has 32 divisors (see below), whose sum is σ = 109068664320. Its totient is φ = 30353018592.

The previous prime is 66639407573. The next prime is 66639407629. The reversal of 66639407614 is 41670493666.

66639407614 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 686127 + ... + 777205.

It is an arithmetic number, because the mean of its divisors is an integer number (3408395760).

Almost surely, 2^66639407614 is an apocalyptic number.

66639407614 is a deficient number, since it is larger than the sum of its proper divisors (42429256706).

66639407614 is a wasteful number, since it uses less digits than its factorization.

66639407614 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91464.

The product of its (nonzero) digits is 3919104, while the sum is 52.

The spelling of 66639407614 in words is "sixty-six billion, six hundred thirty-nine million, four hundred seven thousand, six hundred fourteen".