61680625 has 10 divisors (see below), whose sum is σ = 77076890. Its totient is φ = 49344000.

The previous prime is 61680581. The next prime is 61680643. The reversal of 61680625 is 52608616.

It can be written as a sum of positive squares in 5 ways, for example, as 21687649 + 39992976 = 4657^2 + 6324^2 .

It is not a de Polignac number, because 61680625 - 2¹¹ = 61678577 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 48720 + ... + 49969.

It is an arithmetic number, because the mean of its divisors is an integer number (7707689).

Almost surely, 2^61680625 is an apocalyptic number.

It is an amenable number.

61680625 is a deficient number, since it is larger than the sum of its proper divisors (15396265).

61680625 is an frugal number, since it uses more digits than its factorization.

61680625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98709 (or 98694 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 61680625 is about 7853.7013566853. The cubic root of 61680625 is about 395.1083930483.

The spelling of 61680625 in words is "sixty-one million, six hundred eighty thousand, six hundred twenty-five".