61166831 has 6 divisors (see below), whose sum is σ = 67233096. Its totient is φ = 55606100.

The previous prime is 61166827. The next prime is 61166837. The reversal of 61166831 is 13866116.

It is not a de Polignac number, because 61166831 - 2² = 61166827 is a prime.

It is a super-2 number, since 2×61166831² = 7482762429165122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61166837) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 252635 + ... + 252876.

It is an arithmetic number, because the mean of its divisors is an integer number (11205516).

Almost surely, 2^61166831 is an apocalyptic number.

61166831 is a deficient number, since it is larger than the sum of its proper divisors (6066265).

61166831 is a wasteful number, since it uses less digits than its factorization.

61166831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505533 (or 505522 counting only the distinct ones).

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

The square root of 61166831 is about 7820.9226437806. The cubic root of 61166831 is about 394.0082603678.

The spelling of 61166831 in words is "sixty-one million, one hundred sixty-six thousand, eight hundred thirty-one".