66617242460 has 24 divisors (see below), whose sum is σ = 139945639680. Its totient is φ = 26637481664.

The previous prime is 66617242453. The next prime is 66617242537. The reversal of 66617242460 is 6424271666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 530300 + ... + 643779.

It is an arithmetic number, because the mean of its divisors is an integer number (5831068320).

Almost surely, 2^66617242460 is an apocalyptic number.

It is an amenable number.

66617242460 is an abundant number, since it is smaller than the sum of its proper divisors (73328397220).

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

66617242460 is a wasteful number, since it uses less digits than its factorization.

66617242460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1176925 (or 1176923 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 44.

The spelling of 66617242460 in words is "sixty-six billion, six hundred seventeen million, two hundred forty-two thousand, four hundred sixty".