61166672784 has 60 divisors (see below), whose sum is σ = 195636266176. Its totient is φ = 17476191936.

The previous prime is 61166672779. The next prime is 61166672821. The reversal of 61166672784 is 48727666116.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 61166672784.

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 11 ways as a sum of consecutive naturals, for example, 30339604 + ... + 30341619.

Almost surely, 2^61166672784 is an apocalyptic number.

It is an amenable number.

61166672784 is an abundant number, since it is smaller than the sum of its proper divisors (134469593392).

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

61166672784 is a wasteful number, since it uses less digits than its factorization.

61166672784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60681244 (or 60681235 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 54.

The spelling of 61166672784 in words is "sixty-one billion, one hundred sixty-six million, six hundred seventy-two thousand, seven hundred eighty-four".