66566234460 has 48 divisors (see below), whose sum is σ = 203329590912. Its totient is φ = 16137268800.

The previous prime is 66566234459. The next prime is 66566234479. The reversal of 66566234460 is 6443266566.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

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, 50428306 + ... + 50429625.

It is an arithmetic number, because the mean of its divisors is an integer number (4236033144).

Almost surely, 2^66566234460 is an apocalyptic number.

66566234460 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66566234460 is an abundant number, since it is smaller than the sum of its proper divisors (136763356452).

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

66566234460 is a wasteful number, since it uses less digits than its factorization.

66566234460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100857954 (or 100857952 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 48.

The spelling of 66566234460 in words is "sixty-six billion, five hundred sixty-six million, two hundred thirty-four thousand, four hundred sixty".