66747513 has 32 divisors (see below), whose sum is σ = 107965440. Its totient is φ = 35830080.

The previous prime is 66747503. The next prime is 66747533. The reversal of 66747513 is 31574766.

It is not a de Polignac number, because 66747513 - 2⁸ = 66747257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66747503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51631 + ... + 52907.

It is an arithmetic number, because the mean of its divisors is an integer number (3373920).

Almost surely, 2^66747513 is an apocalyptic number.

It is an amenable number.

66747513 is a deficient number, since it is larger than the sum of its proper divisors (41217927).

66747513 is a wasteful number, since it uses less digits than its factorization.

66747513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1437.

The product of its digits is 105840, while the sum is 39.

The square root of 66747513 is about 8169.9151158381. The cubic root of 66747513 is about 405.6439747360.

The spelling of 66747513 in words is "sixty-six million, seven hundred forty-seven thousand, five hundred thirteen".