661375060 has 48 divisors (see below), whose sum is σ = 1404071424. Its totient is φ = 261675648.

The previous prime is 661375031. The next prime is 661375061. The reversal of 661375060 is 60573166.

It is a happy number.

661375060 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 not an unprimeable number, because it can be changed into a prime (661375061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1089277 + ... + 1089883.

It is an arithmetic number, because the mean of its divisors is an integer number (29251488).

Almost surely, 2^661375060 is an apocalyptic number.

It is an amenable number.

661375060 is an abundant number, since it is smaller than the sum of its proper divisors (742696364).

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

661375060 is a wasteful number, since it uses less digits than its factorization.

661375060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1120 (or 1118 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 661375060 is about 25717.2133016002. The cubic root of 661375060 is about 871.2630002170.

The spelling of 661375060 in words is "six hundred sixty-one million, three hundred seventy-five thousand, sixty".