61166280 has 64 divisors (see below), whose sum is σ = 209715840. Its totient is φ = 13980672.

The previous prime is 61166213. The next prime is 61166297. The reversal of 61166280 is 8266116.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 35569 + ... + 37248.

It is an arithmetic number, because the mean of its divisors is an integer number (3276810).

Almost surely, 2^61166280 is an apocalyptic number.

61166280 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61166280 is an abundant number, since it is smaller than the sum of its proper divisors (148549560).

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

61166280 is a wasteful number, since it uses less digits than its factorization.

61166280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72838 (or 72834 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 61166280 is about 7820.8874176784. The cubic root of 61166280 is about 394.0070772690.

The spelling of 61166280 in words is "sixty-one million, one hundred sixty-six thousand, two hundred eighty".