6612561537 has 8 divisors (see below), whose sum is σ = 8837692800. Its totient is φ = 4397902320.

The previous prime is 6612561533. The next prime is 6612561551. The reversal of 6612561537 is 7351652166.

6612561537 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 6612561537 - 2² = 6612561533 is a prime.

It is a super-2 number, since 2×6612561537² = 87451940161223604738, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6612561533) 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, 2616537 + ... + 2619062.

It is an arithmetic number, because the mean of its divisors is an integer number (1104711600).

Almost surely, 2^6612561537 is an apocalyptic number.

It is an amenable number.

6612561537 is a deficient number, since it is larger than the sum of its proper divisors (2225131263).

6612561537 is a wasteful number, since it uses less digits than its factorization.

6612561537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5236023.

The product of its digits is 226800, while the sum is 42.

The square root of 6612561537 is about 81317.6582114857. The cubic root of 6612561537 is about 1876.9667339051.

The spelling of 6612561537 in words is "six billion, six hundred twelve million, five hundred sixty-one thousand, five hundred thirty-seven".