66877582558 has 32 divisors (see below), whose sum is σ = 103095625248. Its totient is φ = 32526489600.

The previous prime is 66877582537. The next prime is 66877582561. The reversal of 66877582558 is 85528577866.

It is a super-2 number, since 2×66877582558² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (67).

It is a junction number, because it is equal to n+sod(n) for n = 66877582493 and 66877582502.

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, 5986498 + ... + 5997658.

It is an arithmetic number, because the mean of its divisors is an integer number (3221738289).

Almost surely, 2^66877582558 is an apocalyptic number.

66877582558 is a deficient number, since it is larger than the sum of its proper divisors (36218042690).

66877582558 is a wasteful number, since it uses less digits than its factorization.

66877582558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11788.

The product of its digits is 225792000, while the sum is 67.

The spelling of 66877582558 in words is "sixty-six billion, eight hundred seventy-seven million, five hundred eighty-two thousand, five hundred fifty-eight".