66317530 has 16 divisors (see below), whose sum is σ = 120489120. Its totient is φ = 26278672.

The previous prime is 66317497. The next prime is 66317557. The reversal of 66317530 is 3571366.

It is a junction number, because it is equal to n+sod(n) for n = 66317492 and 66317501.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29920 + ... + 32059.

It is an arithmetic number, because the mean of its divisors is an integer number (7530570).

Almost surely, 2^66317530 is an apocalyptic number.

66317530 is a deficient number, since it is larger than the sum of its proper divisors (54171590).

66317530 is a wasteful number, since it uses less digits than its factorization.

66317530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62093.

The product of its (nonzero) digits is 11340, while the sum is 31.

The square root of 66317530 is about 8143.5575763913. The cubic root of 66317530 is about 404.7710538559.

Adding to 66317530 its reverse (3571366), we get a palindrome (69888896).

It can be divided in two parts, 6631 and 7530, that added together give a square (14161 = 119²).

The spelling of 66317530 in words is "sixty-six million, three hundred seventeen thousand, five hundred thirty".