5615061661 has 8 divisors (see below), whose sum is σ = 6126148800. Its totient is φ = 5104079040.

The previous prime is 5615061649. The next prime is 5615061667. The reversal of 5615061661 is 1661605165.

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

It is a cyclic number.

It is not a de Polignac number, because 5615061661 - 2⁷ = 5615061533 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5615061661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5615061667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123480 + ... + 162718.

It is an arithmetic number, because the mean of its divisors is an integer number (765768600).

Almost surely, 2^5615061661 is an apocalyptic number.

It is an amenable number.

5615061661 is a deficient number, since it is larger than the sum of its proper divisors (511087139).

5615061661 is a wasteful number, since it uses less digits than its factorization.

5615061661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52259.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 5615061661 is about 74933.7151154272. The cubic root of 5615061661 is about 1777.3986388922.

The spelling of 5615061661 in words is "five billion, six hundred fifteen million, sixty-one thousand, six hundred sixty-one".