61166520265 has 8 divisors (see below), whose sum is σ = 73419147648. Its totient is φ = 48920334000.

The previous prime is 61166520253. The next prime is 61166520271. The reversal of 61166520265 is 56202566116.

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

It is not a de Polignac number, because 61166520265 - 2⁹ = 61166519753 is a prime.

It is a Duffinian 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, 1589361 + ... + 1627390.

It is an arithmetic number, because the mean of its divisors is an integer number (9177393456).

Almost surely, 2^61166520265 is an apocalyptic number.

It is an amenable number.

61166520265 is a deficient number, since it is larger than the sum of its proper divisors (12252627383).

61166520265 is a wasteful number, since it uses less digits than its factorization.

61166520265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3220559.

The product of its (nonzero) digits is 129600, while the sum is 40.

The spelling of 61166520265 in words is "sixty-one billion, one hundred sixty-six million, five hundred twenty thousand, two hundred sixty-five".