66877661054018 has 64 divisors (see below), whose sum is σ = 104514696576000. Its totient is φ = 32056709228544.

The previous prime is 66877661053999. The next prime is 66877661054063. The reversal of 66877661054018 is 81045016677866.

It is a super-2 number, since 2×66877661054018² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19480820030 + ... + 19480823462.

It is an arithmetic number, because the mean of its divisors is an integer number (1633042134000).

Almost surely, 2^{66877661054018} is an apocalyptic number.

66877661054018 is a deficient number, since it is larger than the sum of its proper divisors (37637035521982).

66877661054018 is a wasteful number, since it uses less digits than its factorization.

66877661054018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7259.

The product of its (nonzero) digits is 81285120, while the sum is 65.

The spelling of 66877661054018 in words is "sixty-six trillion, eight hundred seventy-seven billion, six hundred sixty-one million, fifty-four thousand, eighteen".