66331607710 has 16 divisors (see below), whose sum is σ = 119447721792. Its totient is φ = 26521348000.

The previous prime is 66331607701. The next prime is 66331607759. The reversal of 66331607710 is 1770613366.

It is a happy number.

66331607710 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 7 ways as a sum of consecutive naturals, for example, 1387201 + ... + 1434220.

It is an arithmetic number, because the mean of its divisors is an integer number (7465482612).

Almost surely, 2^66331607710 is an apocalyptic number.

66331607710 is a deficient number, since it is larger than the sum of its proper divisors (53116114082).

66331607710 is a wasteful number, since it uses less digits than its factorization.

66331607710 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2823779.

The product of its (nonzero) digits is 95256, while the sum is 40.

It can be divided in two parts, 66331 and 607710, that added together give a square (674041 = 821²).

The spelling of 66331607710 in words is "sixty-six billion, three hundred thirty-one million, six hundred seven thousand, seven hundred ten".