61166217 has 16 divisors (see below), whose sum is σ = 95725952. Its totient is φ = 34007040.

The previous prime is 61166213. The next prime is 61166297. The reversal of 61166217 is 71266116.

It is not a de Polignac number, because 61166217 - 2² = 61166213 is a prime.

It is a super-2 number, since 2×61166217² = 7482612204182178, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61166213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38584 + ... + 40137.

It is an arithmetic number, because the mean of its divisors is an integer number (5982872).

Almost surely, 2^61166217 is an apocalyptic number.

It is an amenable number.

61166217 is a deficient number, since it is larger than the sum of its proper divisors (34559735).

61166217 is a wasteful number, since it uses less digits than its factorization.

61166217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78768.

The product of its digits is 3024, while the sum is 30.

The square root of 61166217 is about 7820.8833900014. The cubic root of 61166217 is about 394.0069419959.

The spelling of 61166217 in words is "sixty-one million, one hundred sixty-six thousand, two hundred seventeen".