61660860774 has 8 divisors (see below), whose sum is σ = 123321721560. Its totient is φ = 20553620256.

The previous prime is 61660860773. The next prime is 61660860809. The reversal of 61660860774 is 47706806616.

It is a sphenic number, since it is the product of 3 distinct primes.

61660860774 is an admirable number.

It is a super-2 number, since 2×61660860774² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61660860773) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 5138405059 + ... + 5138405070.

It is an arithmetic number, because the mean of its divisors is an integer number (15415215195).

Almost surely, 2^61660860774 is an apocalyptic number.

61660860774 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

61660860774 is a wasteful number, since it uses less digits than its factorization.

61660860774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10276810134.

The product of its (nonzero) digits is 2032128, while the sum is 51.

The spelling of 61660860774 in words is "sixty-one billion, six hundred sixty million, eight hundred sixty thousand, seven hundred seventy-four".