666523351 has 8 divisors (see below), whose sum is σ = 718144784. Its totient is φ = 614952000.

The previous prime is 666523331. The next prime is 666523357. The reversal of 666523351 is 153325666.

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

It is a de Polignac number, because none of the positive numbers 2^k-666523351 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 666523351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666523357) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 17875 + ... + 40651.

It is an arithmetic number, because the mean of its divisors is an integer number (89768098).

Almost surely, 2^666523351 is an apocalyptic number.

666523351 is a deficient number, since it is larger than the sum of its proper divisors (51621433).

666523351 is a wasteful number, since it uses less digits than its factorization.

666523351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25041.

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

The square root of 666523351 is about 25817.1135295951. The cubic root of 666523351 is about 873.5178613667.

The spelling of 666523351 in words is "six hundred sixty-six million, five hundred twenty-three thousand, three hundred fifty-one".