61660680 has 32 divisors (see below), whose sum is σ = 184982400. Its totient is φ = 16442816.

The previous prime is 61660657. The next prime is 61660777. The reversal of 61660680 is 8606616.

61660680 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256800 + ... + 257039.

It is an arithmetic number, because the mean of its divisors is an integer number (5780700).

Almost surely, 2^61660680 is an apocalyptic number.

61660680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61660680 is an abundant number, since it is smaller than the sum of its proper divisors (123321720).

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

61660680 is a wasteful number, since it uses less digits than its factorization.

61660680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513853 (or 513849 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 61660680 is about 7852.4314705701. The cubic root of 61660680 is about 395.0658011407.

The spelling of 61660680 in words is "sixty-one million, six hundred sixty thousand, six hundred eighty".