660534247 has 8 divisors (see below), whose sum is σ = 691963200. Its totient is φ = 629682144.

The previous prime is 660534233. The next prime is 660534253. The reversal of 660534247 is 742435066.

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

It is a cyclic number.

It is not a de Polignac number, because 660534247 - 2²⁷ = 526316519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660532247) 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, 141868 + ... + 146449.

It is an arithmetic number, because the mean of its divisors is an integer number (86495400).

Almost surely, 2^660534247 is an apocalyptic number.

660534247 is a deficient number, since it is larger than the sum of its proper divisors (31428953).

660534247 is a wasteful number, since it uses less digits than its factorization.

660534247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288425.

The product of its (nonzero) digits is 120960, while the sum is 37.

The square root of 660534247 is about 25700.8608221592. The cubic root of 660534247 is about 870.8936284028.

The spelling of 660534247 in words is "six hundred sixty million, five hundred thirty-four thousand, two hundred forty-seven".