61660360 has 32 divisors (see below), whose sum is σ = 146898360. Its totient is φ = 23213056.

The previous prime is 61660331. The next prime is 61660363. The reversal of 61660360 is 6306616.

It can be written as a sum of positive squares in 4 ways, for example, as 39363076 + 22297284 = 6274^2 + 4722^2 .

It is not an unprimeable number, because it can be changed into a prime (61660363) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44659 + ... + 46018.

Almost surely, 2^61660360 is an apocalyptic number.

It is an amenable number.

61660360 is an abundant number, since it is smaller than the sum of its proper divisors (85238000).

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

61660360 is a wasteful number, since it uses less digits than its factorization.

61660360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90705 (or 90701 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 61660360 is about 7852.4110946893. The cubic root of 61660360 is about 395.0651177161.

Adding to 61660360 its reverse (6306616), we get a palindrome (67966976).

The spelling of 61660360 in words is "sixty-one million, six hundred sixty thousand, three hundred sixty".