61166220 has 48 divisors (see below), whose sum is σ = 177176160. Its totient is φ = 15748096.

The previous prime is 61166213. The next prime is 61166297. The reversal of 61166220 is 2266116.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15837 + ... + 19316.

It is an arithmetic number, because the mean of its divisors is an integer number (3691170).

Almost surely, 2^61166220 is an apocalyptic number.

61166220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61166220 is an abundant number, since it is smaller than the sum of its proper divisors (116009940).

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

61166220 is a wasteful number, since it uses less digits than its factorization.

61166220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35194 (or 35192 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 61166220 is about 7820.8835817956. The cubic root of 61166220 is about 394.0069484375.

The spelling of 61166220 in words is "sixty-one million, one hundred sixty-six thousand, two hundred twenty".