66512353 has 4 divisors (see below), whose sum is σ = 67158208. Its totient is φ = 65866500.

The previous prime is 66512323. The next prime is 66512393. The reversal of 66512353 is 35321566.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66512353 - 2²¹ = 64415201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66512323) by changing a digit.

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, 322773 + ... + 322978.

It is an arithmetic number, because the mean of its divisors is an integer number (16789552).

Almost surely, 2^66512353 is an apocalyptic number.

It is an amenable number.

66512353 is a deficient number, since it is larger than the sum of its proper divisors (645855).

66512353 is a wasteful number, since it uses less digits than its factorization.

66512353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645854.

The product of its digits is 16200, while the sum is 31.

The square root of 66512353 is about 8155.5105910053. The cubic root of 66512353 is about 405.1670357074.

The spelling of 66512353 in words is "sixty-six million, five hundred twelve thousand, three hundred fifty-three".