61665160 has 16 divisors (see below), whose sum is σ = 138746700. Its totient is φ = 24666048.

The previous prime is 61665113. The next prime is 61665167. The reversal of 61665160 is 6156616.

It can be written as a sum of positive squares in 2 ways, for example, as 59938564 + 1726596 = 7742^2 + 1314^2 .

It is not an unprimeable number, because it can be changed into a prime (61665167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 770775 + ... + 770854.

Almost surely, 2^61665160 is an apocalyptic number.

It is an amenable number.

61665160 is an abundant number, since it is smaller than the sum of its proper divisors (77081540).

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

61665160 is a wasteful number, since it uses less digits than its factorization.

61665160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1541640 (or 1541636 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 61665160 is about 7852.7167273498. The cubic root of 61665160 is about 395.0753688367.

The spelling of 61665160 in words is "sixty-one million, six hundred sixty-five thousand, one hundred sixty".