661073584 has 10 divisors (see below), whose sum is σ = 1280830100. Its totient is φ = 330536784.

The previous prime is 661073557. The next prime is 661073597. The reversal of 661073584 is 485370166.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20658534 + ... + 20658565.

It is an arithmetic number, because the mean of its divisors is an integer number (128083010).

Almost surely, 2^661073584 is an apocalyptic number.

It is an amenable number.

661073584 is a deficient number, since it is larger than the sum of its proper divisors (619756516).

661073584 is a wasteful number, since it uses less digits than its factorization.

661073584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41317107 (or 41317101 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 661073584 is about 25711.3512674850. The cubic root of 661073584 is about 871.1305968750.

The spelling of 661073584 in words is "six hundred sixty-one million, seventy-three thousand, five hundred eighty-four".