661060608 has 88 divisors (see below), whose sum is σ = 1897618128. Its totient is φ = 203390976.

The previous prime is 661060591. The next prime is 661060613. The reversal of 661060608 is 806060166.

It is a super-2 number, since 2×661060608² = 874002254898659328, which contains 22 as substring.

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, 31660 + ... + 48212.

Almost surely, 2^661060608 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 661060608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (948809064).

661060608 is an abundant number, since it is smaller than the sum of its proper divisors (1236557520).

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

661060608 is a wasteful number, since it uses less digits than its factorization.

661060608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16589 (or 16571 counting only the distinct ones).

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

The square root of 661060608 is about 25711.0989263392. The cubic root of 661060608 is about 871.1248971240.

The spelling of 661060608 in words is "six hundred sixty-one million, sixty thousand, six hundred eight".