660279995 has 4 divisors (see below), whose sum is σ = 792336000. Its totient is φ = 528223992.

The previous prime is 660279973. The next prime is 660280037. The reversal of 660279995 is 599972066.

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

It is a cyclic number.

It is not a de Polignac number, because 660279995 - 2¹² = 660275899 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66027995 + ... + 66028004.

It is an arithmetic number, because the mean of its divisors is an integer number (198084000).

Almost surely, 2^660279995 is an apocalyptic number.

660279995 is a deficient number, since it is larger than the sum of its proper divisors (132056005).

660279995 is a wasteful number, since it uses less digits than its factorization.

660279995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132056004.

The product of its (nonzero) digits is 1837080, while the sum is 53.

The square root of 660279995 is about 25695.9139747937. The cubic root of 660279995 is about 870.7818729744.

The spelling of 660279995 in words is "six hundred sixty million, two hundred seventy-nine thousand, nine hundred ninety-five".