66942299 has 12 divisors (see below), whose sum is σ = 70900200. Its totient is φ = 63165600.

The previous prime is 66942283. The next prime is 66942331. The reversal of 66942299 is 99224966.

It is not a de Polignac number, because 66942299 - 2⁴ = 66942283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66942229) 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, 38552 + ... + 40250.

It is an arithmetic number, because the mean of its divisors is an integer number (5908350).

Almost surely, 2^66942299 is an apocalyptic number.

66942299 is a deficient number, since it is larger than the sum of its proper divisors (3957901).

66942299 is a wasteful number, since it uses less digits than its factorization.

66942299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1802 (or 1771 counting only the distinct ones).

The product of its digits is 419904, while the sum is 47.

The square root of 66942299 is about 8181.8273631262. The cubic root of 66942299 is about 406.0381818379.

The spelling of 66942299 in words is "sixty-six million, nine hundred forty-two thousand, two hundred ninety-nine".