660553066 has 8 divisors (see below), whose sum is σ = 990954720. Its totient is φ = 330234828.

The previous prime is 660553043. The next prime is 660553073. The reversal of 660553066 is 660355066.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5715 + ... + 36793.

It is an arithmetic number, because the mean of its divisors is an integer number (123869340).

Almost surely, 2^660553066 is an apocalyptic number.

660553066 is a deficient number, since it is larger than the sum of its proper divisors (330401654).

660553066 is a wasteful number, since it uses less digits than its factorization.

660553066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41708.

The product of its (nonzero) digits is 97200, while the sum is 37.

The square root of 660553066 is about 25701.2269356932. The cubic root of 660553066 is about 870.9018990774.

The spelling of 660553066 in words is "six hundred sixty million, five hundred fifty-three thousand, sixty-six".