68661131 has 16 divisors (see below), whose sum is σ = 86887680. Its totient is φ = 52699680.

The previous prime is 68661121. The next prime is 68661133. The reversal of 68661131 is 13116686.

It is a de Polignac number, because none of the positive numbers 2^k-68661131 is a prime.

It is a super-2 number, since 2×68661131² = 9428701820398322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68661133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1496 + ... + 11813.

It is an arithmetic number, because the mean of its divisors is an integer number (5430480).

Almost surely, 2^68661131 is an apocalyptic number.

68661131 is a deficient number, since it is larger than the sum of its proper divisors (18226549).

68661131 is a wasteful number, since it uses less digits than its factorization.

68661131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13394.

The product of its digits is 5184, while the sum is 32.

The square root of 68661131 is about 8286.2012406168. The cubic root of 68661131 is about 409.4840446145.

It can be divided in two parts, 6866 and 1131, that added together give a palindrome (7997).

The spelling of 68661131 in words is "sixty-eight million, six hundred sixty-one thousand, one hundred thirty-one".