61660362260 has 48 divisors (see below), whose sum is σ = 151004985600. Its totient is φ = 21140693280.

The previous prime is 61660362241. The next prime is 61660362289. The reversal of 61660362260 is 6226306616.

It is a congruent number.

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, 4487336 + ... + 4501055.

It is an arithmetic number, because the mean of its divisors is an integer number (3145937200).

Almost surely, 2^61660362260 is an apocalyptic number.

It is an amenable number.

61660362260 is an abundant number, since it is smaller than the sum of its proper divisors (89344623340).

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

61660362260 is a wasteful number, since it uses less digits than its factorization.

61660362260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8988421 (or 8988405 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 38.

Adding to 61660362260 its reverse (6226306616), we get a palindrome (67886668876).

The spelling of 61660362260 in words is "sixty-one billion, six hundred sixty million, three hundred sixty-two thousand, two hundred sixty".