665656353598 has 24 divisors (see below), whose sum is σ = 1066004082000. Its totient is φ = 311675874048.

The previous prime is 665656353587. The next prime is 665656353599. The reversal of 665656353598 is 895353656566.

It is a hoax number, since the sum of its digits (67) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665656353599) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2778583 + ... + 3008626.

It is an arithmetic number, because the mean of its divisors is an integer number (44416836750).

Almost surely, 2^665656353598 is an apocalyptic number.

665656353598 is a deficient number, since it is larger than the sum of its proper divisors (400347728402).

665656353598 is a wasteful number, since it uses less digits than its factorization.

665656353598 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5787444 (or 5787427 counting only the distinct ones).

The product of its digits is 524880000, while the sum is 67.

The spelling of 665656353598 in words is "six hundred sixty-five billion, six hundred fifty-six million, three hundred fifty-three thousand, five hundred ninety-eight".