61659660 has 48 divisors (see below), whose sum is σ = 173128032. Its totient is φ = 16396800.

The previous prime is 61659623. The next prime is 61659679. The reversal of 61659660 is 6695616.

61659660 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 15 ways as a sum of consecutive naturals, for example, 24040 + ... + 26480.

It is an arithmetic number, because the mean of its divisors is an integer number (3606834).

Almost surely, 2^61659660 is an apocalyptic number.

61659660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61659660 is an abundant number, since it is smaller than the sum of its proper divisors (111468372).

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

61659660 is a wasteful number, since it uses less digits than its factorization.

61659660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2874 (or 2872 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 39.

The square root of 61659660 is about 7852.3665222658. The cubic root of 61659660 is about 395.0636227165.

The spelling of 61659660 in words is "sixty-one million, six hundred fifty-nine thousand, six hundred sixty".