661007608 has 16 divisors (see below), whose sum is σ = 1240414560. Its totient is φ = 330230400.

The previous prime is 661007597. The next prime is 661007623. The reversal of 661007608 is 806700166.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23713 + ... + 43408.

It is an arithmetic number, because the mean of its divisors is an integer number (77525910).

Almost surely, 2^661007608 is an apocalyptic number.

It is an amenable number.

661007608 is a deficient number, since it is larger than the sum of its proper divisors (579406952).

661007608 is a wasteful number, since it uses less digits than its factorization.

661007608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68358 (or 68354 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 661007608 is about 25710.0682223910. The cubic root of 661007608 is about 871.1016159236.

The spelling of 661007608 in words is "six hundred sixty-one million, seven thousand, six hundred eight".