61481660 has 24 divisors (see below), whose sum is σ = 129366720. Its totient is φ = 24544064.

The previous prime is 61481659. The next prime is 61481677. The reversal of 61481660 is 6618416.

It is a happy number.

61481660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 8381 + ... + 13899.

It is an arithmetic number, because the mean of its divisors is an integer number (5390280).

Almost surely, 2^61481660 is an apocalyptic number.

It is an amenable number.

61481660 is an abundant number, since it is smaller than the sum of its proper divisors (67885060).

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

61481660 is a wasteful number, since it uses less digits than its factorization.

61481660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6085 (or 6083 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 61481660 is about 7841.0241677985. The cubic root of 61481660 is about 394.6830978494.

The spelling of 61481660 in words is "sixty-one million, four hundred eighty-one thousand, six hundred sixty".