66299530 has 48 divisors (see below), whose sum is σ = 132388200. Its totient is φ = 23886720.

The previous prime is 66299521. The next prime is 66299533. The reversal of 66299530 is 3599266.

It can be written as a sum of positive squares in 4 ways, for example, as 53831569 + 12467961 = 7337^2 + 3531^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (66299533) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 189796 + ... + 190144.

Almost surely, 2^66299530 is an apocalyptic number.

66299530 is a deficient number, since it is larger than the sum of its proper divisors (66088670).

66299530 is a wasteful number, since it uses less digits than its factorization.

66299530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535 (or 524 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 40.

The square root of 66299530 is about 8142.4523332962. The cubic root of 66299530 is about 404.7344293604.

The spelling of 66299530 in words is "sixty-six million, two hundred ninety-nine thousand, five hundred thirty".