66610506066610 has 32 divisors (see below), whose sum is σ = 132374701230912. Its totient is φ = 23930170850880.

The previous prime is 66610506066509. The next prime is 66610506066617. The reversal of 66610506066610 is 1666060501666.

It is a super-2 number, since 2×66610506066610² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66610506066617) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3647882769 + ... + 3647901028.

It is an arithmetic number, because the mean of its divisors is an integer number (4136709413466).

Almost surely, 2^{66610506066610} is an apocalyptic number.

66610506066610 is a deficient number, since it is larger than the sum of its proper divisors (65764195164302).

66610506066610 is a wasteful number, since it uses less digits than its factorization.

66610506066610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7295783898.

The product of its (nonzero) digits is 1399680, while the sum is 49.

The spelling of 66610506066610 in words is "sixty-six trillion, six hundred ten billion, five hundred six million, sixty-six thousand, six hundred ten".