661076060 has 24 divisors (see below), whose sum is σ = 1390946256. Its totient is φ = 263918720.

The previous prime is 661076057. The next prime is 661076081. The reversal of 661076060 is 60670166.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21302 + ... + 42141.

It is an arithmetic number, because the mean of its divisors is an integer number (57956094).

Almost surely, 2^661076060 is an apocalyptic number.

It is an amenable number.

661076060 is an abundant number, since it is smaller than the sum of its proper divisors (729870196).

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

661076060 is a wasteful number, since it uses less digits than its factorization.

661076060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63973 (or 63971 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 661076060 is about 25711.3994173791. The cubic root of 661076060 is about 871.1316844578.

The spelling of 661076060 in words is "six hundred sixty-one million, seventy-six thousand, sixty".