660073066 has 4 divisors (see below), whose sum is σ = 990109602. Its totient is φ = 330036532.

The previous prime is 660073033. The next prime is 660073103. The reversal of 660073066 is 660370066.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 367834041 + 292239025 = 19179^2 + 17095^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165018265 + ... + 165018268.

Almost surely, 2^660073066 is an apocalyptic number.

660073066 is a deficient number, since it is larger than the sum of its proper divisors (330036536).

660073066 is a wasteful number, since it uses less digits than its factorization.

660073066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330036535.

The product of its (nonzero) digits is 27216, while the sum is 34.

The square root of 660073066 is about 25691.8871630715. The cubic root of 660073066 is about 870.6908969993.

The spelling of 660073066 in words is "six hundred sixty million, seventy-three thousand, sixty-six".