61330660 has 12 divisors (see below), whose sum is σ = 128794428. Its totient is φ = 24532256.

The previous prime is 61330639. The next prime is 61330693. The reversal of 61330660 is 6603316.

It can be written as a sum of positive squares in 2 ways, for example, as 8797156 + 52533504 = 2966^2 + 7248^2 .

It is a super-2 number, since 2×61330660² = 7522899712071200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1533247 + ... + 1533286.

It is an arithmetic number, because the mean of its divisors is an integer number (10732869).

Almost surely, 2^61330660 is an apocalyptic number.

It is an amenable number.

61330660 is an abundant number, since it is smaller than the sum of its proper divisors (67463768).

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

61330660 is a wasteful number, since it uses less digits than its factorization.

61330660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3066542 (or 3066540 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 61330660 is about 7831.3894041862. The cubic root of 61330660 is about 394.3597168336.

Adding to 61330660 its reverse (6603316), we get a palindrome (67933976).

The spelling of 61330660 in words is "sixty-one million, three hundred thirty thousand, six hundred sixty".