66477632660 has 48 divisors (see below), whose sum is σ = 148156673616. Its totient is φ = 24969019392.

The previous prime is 66477632633. The next prime is 66477632701. The reversal of 66477632660 is 6623677466.

It can be written as a sum of positive squares in 8 ways, for example, as 1269924496 + 65207708164 = 35636^2 + 255358^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78557 + ... + 372996.

It is an arithmetic number, because the mean of its divisors is an integer number (3086597367).

Almost surely, 2^66477632660 is an apocalyptic number.

It is an amenable number.

66477632660 is an abundant number, since it is smaller than the sum of its proper divisors (81679040956).

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

66477632660 is a wasteful number, since it uses less digits than its factorization.

66477632660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452012 (or 452010 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 53.

The spelling of 66477632660 in words is "sixty-six billion, four hundred seventy-seven million, six hundred thirty-two thousand, six hundred sixty".