61610660 has 24 divisors (see below), whose sum is σ = 129552696. Its totient is φ = 24611840.

The previous prime is 61610657. The next prime is 61610683. The reversal of 61610660 is 6601616.

It can be written as a sum of positive squares in 4 ways, for example, as 4426816 + 57183844 = 2104^2 + 7562^2 .

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, 18740 + ... + 21780.

It is an arithmetic number, because the mean of its divisors is an integer number (5398029).

Almost surely, 2^61610660 is an apocalyptic number.

It is an amenable number.

61610660 is an abundant number, since it is smaller than the sum of its proper divisors (67942036).

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

61610660 is a wasteful number, since it uses less digits than its factorization.

61610660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4063 (or 4061 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 61610660 is about 7849.2458236445. The cubic root of 61610660 is about 394.9589446193.

The spelling of 61610660 in words is "sixty-one million, six hundred ten thousand, six hundred sixty".