66490299 has 12 divisors (see below), whose sum is σ = 97032936. Its totient is φ = 43869312.

The previous prime is 66490261. The next prime is 66490321. The reversal of 66490299 is 99209466.

It is not a de Polignac number, because 66490299 - 2²³ = 58101691 is a prime.

It is a super-2 number, since 2×66490299² = 8841919722218802, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) 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 (66490199) 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 11 ways as a sum of consecutive naturals, for example, 37209 + ... + 38954.

It is an arithmetic number, because the mean of its divisors is an integer number (8086078).

Almost surely, 2^66490299 is an apocalyptic number.

66490299 is a deficient number, since it is larger than the sum of its proper divisors (30542637).

66490299 is a wasteful number, since it uses less digits than its factorization.

66490299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76266 (or 76263 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The square root of 66490299 is about 8154.1583869827. The cubic root of 66490299 is about 405.1222493322.

The spelling of 66490299 in words is "sixty-six million, four hundred ninety thousand, two hundred ninety-nine".