660645267 has 8 divisors (see below), whose sum is σ = 882472896. Its totient is φ = 439623912.

The previous prime is 660645253. The next prime is 660645281. The reversal of 660645267 is 762546066.

It is an interprime number because it is at equal distance from previous prime (660645253) and next prime (660645281).

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

It is not a de Polignac number, because 660645267 - 2⁶ = 660645203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (660645367) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199653 + ... + 202934.

It is an arithmetic number, because the mean of its divisors is an integer number (110309112).

Almost surely, 2^660645267 is an apocalyptic number.

660645267 is a deficient number, since it is larger than the sum of its proper divisors (221827629).

660645267 is a wasteful number, since it uses less digits than its factorization.

660645267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403137.

The product of its (nonzero) digits is 362880, while the sum is 42.

The square root of 660645267 is about 25703.0205812469. The cubic root of 660645267 is about 870.9424177954.

The spelling of 660645267 in words is "six hundred sixty million, six hundred forty-five thousand, two hundred sixty-seven".