61660706612 has 24 divisors (see below), whose sum is σ = 117249565440. Its totient is φ = 28265518080.

The previous prime is 61660706609. The next prime is 61660706621. The reversal of 61660706612 is 21660706616.

It is a super-2 number, since 2×61660706612² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61660706612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13083533 + ... + 13088244.

It is an arithmetic number, because the mean of its divisors is an integer number (4885398560).

Almost surely, 2^61660706612 is an apocalyptic number.

61660706612 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

61660706612 is a deficient number, since it is larger than the sum of its proper divisors (55588858828).

61660706612 is a wasteful number, since it uses less digits than its factorization.

61660706612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26171831 (or 26171829 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 41.

The spelling of 61660706612 in words is "sixty-one billion, six hundred sixty million, seven hundred six thousand, six hundred twelve".