61611006660 has 96 divisors (see below), whose sum is σ = 205727219712. Its totient is φ = 13470230400.

The previous prime is 61611006577. The next prime is 61611006679. The reversal of 61611006660 is 6660011616.

It is a super-2 number, since 2×61611006660² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3179316 + ... + 3198635.

It is an arithmetic number, because the mean of its divisors is an integer number (2142991872).

Almost surely, 2^61611006660 is an apocalyptic number.

61611006660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61611006660 is an abundant number, since it is smaller than the sum of its proper divisors (144116213052).

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

61611006660 is a wasteful number, since it uses less digits than its factorization.

61611006660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6377993 (or 6377991 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The spelling of 61611006660 in words is "sixty-one billion, six hundred eleven million, six thousand, six hundred sixty".