665433357660 has 72 divisors (see below), whose sum is σ = 2018813758416. Its totient is φ = 177419658240.

The previous prime is 665433357623. The next prime is 665433357683. The reversal of 665433357660 is 66753334566.

665433357660 is a `hidden beast` number, since 6 + 6 + 5 + 4 + 3 + 3 + 3 + 576 + 60 = 666.

It is a super-2 number, since 2×665433357660² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 665433357597 and 665433357606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 802092 + ... + 1405068.

It is an arithmetic number, because the mean of its divisors is an integer number (28039079978).

Almost surely, 2^665433357660 is an apocalyptic number.

665433357660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

665433357660 is an abundant number, since it is smaller than the sum of its proper divisors (1353380400756).

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

665433357660 is a wasteful number, since it uses less digits than its factorization.

665433357660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609123 (or 609118 counting only the distinct ones).

The product of its (nonzero) digits is 24494400, while the sum is 54.

The spelling of 665433357660 in words is "six hundred sixty-five billion, four hundred thirty-three million, three hundred fifty-seven thousand, six hundred sixty".