661295552 has 28 divisors (see below), whose sum is σ = 1315303440. Its totient is φ = 329880576.

The previous prime is 661295533. The next prime is 661295567. The reversal of 661295552 is 255592166.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16328 + ... + 39864.

Almost surely, 2^661295552 is an apocalyptic number.

It is an amenable number.

661295552 is a deficient number, since it is larger than the sum of its proper divisors (654007888).

661295552 is a wasteful number, since it uses less digits than its factorization.

661295552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23988 (or 23978 counting only the distinct ones).

The product of its digits is 162000, while the sum is 41.

The square root of 661295552 is about 25715.6674422423. The cubic root of 661295552 is about 871.2280855073.

The spelling of 661295552 in words is "six hundred sixty-one million, two hundred ninety-five thousand, five hundred fifty-two".