61525660 has 48 divisors (see below), whose sum is σ = 148107456. Its totient is φ = 21030912.

The previous prime is 61525649. The next prime is 61525687. The reversal of 61525660 is 6652516.

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, 91084 + ... + 91756.

It is an arithmetic number, because the mean of its divisors is an integer number (3085572).

Almost surely, 2^61525660 is an apocalyptic number.

It is an amenable number.

61525660 is an abundant number, since it is smaller than the sum of its proper divisors (86581796).

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

61525660 is a wasteful number, since it uses less digits than its factorization.

61525660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1342 (or 1340 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 61525660 is about 7843.8294219087. The cubic root of 61525660 is about 394.7772284417. Note that the first 3 decimals are identical.

The spelling of 61525660 in words is "sixty-one million, five hundred twenty-five thousand, six hundred sixty".