61166620 has 12 divisors (see below), whose sum is σ = 128449944. Its totient is φ = 24466640.

The previous prime is 61166617. The next prime is 61166621. The reversal of 61166620 is 2666116.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61166621) 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, 1529146 + ... + 1529185.

It is an arithmetic number, because the mean of its divisors is an integer number (10704162).

Almost surely, 2^61166620 is an apocalyptic number.

It is an amenable number.

61166620 is an abundant number, since it is smaller than the sum of its proper divisors (67283324).

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

61166620 is a wasteful number, since it uses less digits than its factorization.

61166620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3058340 (or 3058338 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 61166620 is about 7820.9091543119. The cubic root of 61166620 is about 394.0078073126.

The spelling of 61166620 in words is "sixty-one million, one hundred sixty-six thousand, six hundred twenty".