66627513 has 12 divisors (see below), whose sum is σ = 96310500. Its totient is φ = 44385696.

The previous prime is 66627499. The next prime is 66627521. The reversal of 66627513 is 31572666.

It can be written as a sum of positive squares in 2 ways, for example, as 16670889 + 49956624 = 4083^2 + 7068^2 .

It is not a de Polignac number, because 66627513 - 2¹⁰ = 66626489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66627553) 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 11 ways as a sum of consecutive naturals, for example, 22863 + ... + 25611.

It is an arithmetic number, because the mean of its divisors is an integer number (8025875).

Almost surely, 2^66627513 is an apocalyptic number.

It is an amenable number.

66627513 is a deficient number, since it is larger than the sum of its proper divisors (29682987).

66627513 is a wasteful number, since it uses less digits than its factorization.

66627513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5448 (or 5445 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 66627513 is about 8162.5677945117. The cubic root of 66627513 is about 405.4007373232.

The spelling of 66627513 in words is "sixty-six million, six hundred twenty-seven thousand, five hundred thirteen".