61064166065 has 16 divisors (see below), whose sum is σ = 83756563968. Its totient is φ = 41866860096.

The previous prime is 61064166041. The next prime is 61064166077. The reversal of 61064166065 is 56066146016.

It is a cyclic number.

It is not a de Polignac number, because 61064166065 - 2⁶ = 61064166001 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149864 + ... + 380246.

It is an arithmetic number, because the mean of its divisors is an integer number (5234785248).

Almost surely, 2^61064166065 is an apocalyptic number.

It is an amenable number.

61064166065 is a deficient number, since it is larger than the sum of its proper divisors (22692397903).

61064166065 is a wasteful number, since it uses less digits than its factorization.

61064166065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237968.

The product of its (nonzero) digits is 155520, while the sum is 41.

The spelling of 61064166065 in words is "sixty-one billion, sixty-four million, one hundred sixty-six thousand, sixty-five".