61551166 has 8 divisors (see below), whose sum is σ = 95510520. Its totient is φ = 29714328.

The previous prime is 61551157. The next prime is 61551167. The reversal of 61551166 is 66115516.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61551167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 530556 + ... + 530671.

It is an arithmetic number, because the mean of its divisors is an integer number (11938815).

Almost surely, 2^61551166 is an apocalyptic number.

61551166 is a deficient number, since it is larger than the sum of its proper divisors (33959354).

61551166 is a wasteful number, since it uses less digits than its factorization.

61551166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061258.

The product of its digits is 5400, while the sum is 31.

The square root of 61551166 is about 7845.4551174549. The cubic root of 61551166 is about 394.8317736883.

The spelling of 61551166 in words is "sixty-one million, five hundred fifty-one thousand, one hundred sixty-six".