61566166 has 16 divisors (see below), whose sum is σ = 94676400. Its totient is φ = 30016800.

The previous prime is 61566157. The next prime is 61566179. The reversal of 61566166 is 66166516.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11260 + ... + 15808.

It is an arithmetic number, because the mean of its divisors is an integer number (5917275).

Almost surely, 2^61566166 is an apocalyptic number.

61566166 is a deficient number, since it is larger than the sum of its proper divisors (33110234).

61566166 is a wasteful number, since it uses less digits than its factorization.

61566166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4719.

The product of its digits is 38880, while the sum is 37.

The square root of 61566166 is about 7846.4110267051. The cubic root of 61566166 is about 394.8638445434.

The spelling of 61566166 in words is "sixty-one million, five hundred sixty-six thousand, one hundred sixty-six".