61631166 has 8 divisors (see below), whose sum is σ = 123262344. Its totient is φ = 20543720.

The previous prime is 61631153. The next prime is 61631189. The reversal of 61631166 is 66113616.

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

61631166 is an admirable number.

It is a nude number because it is divisible by every one of its digits.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5135925 + ... + 5135936.

It is an arithmetic number, because the mean of its divisors is an integer number (15407793).

Almost surely, 2^61631166 is an apocalyptic number.

61631166 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61631166 is a wasteful number, since it uses less digits than its factorization.

61631166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10271866.

The product of its digits is 3888, while the sum is 30.

The square root of 61631166 is about 7850.5519551176. The cubic root of 61631166 is about 395.0027580857.

The spelling of 61631166 in words is "sixty-one million, six hundred thirty-one thousand, one hundred sixty-six".