66644371046 has 24 divisors (see below), whose sum is σ = 110450002152. Its totient is φ = 30135916800.

The previous prime is 66644371037. The next prime is 66644371061. The reversal of 66644371046 is 64017344666.

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, 666740 + ... + 760151.

It is an arithmetic number, because the mean of its divisors is an integer number (4602083423).

Almost surely, 2^66644371046 is an apocalyptic number.

66644371046 is a deficient number, since it is larger than the sum of its proper divisors (43805631106).

66644371046 is a wasteful number, since it uses less digits than its factorization.

66644371046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1427108 (or 1427097 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 47.

The spelling of 66644371046 in words is "sixty-six billion, six hundred forty-four million, three hundred seventy-one thousand, forty-six".