66371513 has 8 divisors (see below), whose sum is σ = 71637888. Its totient is φ = 61128144.

The previous prime is 66371509. The next prime is 66371533. The reversal of 66371513 is 31517366.

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 66371513 - 2² = 66371509 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 66371513.

It is not an unprimeable number, because it can be changed into a prime (66371533) 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, 506 + ... + 11532.

It is an arithmetic number, because the mean of its divisors is an integer number (8954736).

Almost surely, 2^66371513 is an apocalyptic number.

It is an amenable number.

66371513 is a deficient number, since it is larger than the sum of its proper divisors (5266375).

66371513 is a wasteful number, since it uses less digits than its factorization.

66371513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11503.

The product of its digits is 11340, while the sum is 32.

The square root of 66371513 is about 8146.8713626766. The cubic root of 66371513 is about 404.8808530276.

Adding to 66371513 its reverse (31517366), we get a palindrome (97888879).

The spelling of 66371513 in words is "sixty-six million, three hundred seventy-one thousand, five hundred thirteen".