61160665665 has 32 divisors (see below), whose sum is σ = 106815687552. Its totient is φ = 29636288000.

The previous prime is 61160665663. The next prime is 61160665667. The reversal of 61160665665 is 56656606116.

It is an interprime number because it is at equal distance from previous prime (61160665663) and next prime (61160665667).

It is not a de Polignac number, because 61160665665 - 2¹ = 61160665663 is a prime.

It is a super-4 number, since 4×61160665665⁴ (a number of 44 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (61160665661) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 176275 + ... + 391655.

It is an arithmetic number, because the mean of its divisors is an integer number (3337990236).

Almost surely, 2^61160665665 is an apocalyptic number.

It is an amenable number.

61160665665 is a deficient number, since it is larger than the sum of its proper divisors (45655021887).

61160665665 is a wasteful number, since it uses less digits than its factorization.

61160665665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217121.

The product of its (nonzero) digits is 1166400, while the sum is 48.

The spelling of 61160665665 in words is "sixty-one billion, one hundred sixty million, six hundred sixty-five thousand, six hundred sixty-five".