66947294 has 16 divisors (see below), whose sum is σ = 101582208. Its totient is φ = 33089112.

The previous prime is 66947291. The next prime is 66947303. The reversal of 66947294 is 49274966.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66947291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75377 + ... + 76259.

It is an arithmetic number, because the mean of its divisors is an integer number (6348888).

Almost surely, 2^66947294 is an apocalyptic number.

66947294 is a deficient number, since it is larger than the sum of its proper divisors (34634914).

66947294 is a wasteful number, since it uses less digits than its factorization.

66947294 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1279.

The product of its digits is 653184, while the sum is 47.

The square root of 66947294 is about 8182.1326070897. The cubic root of 66947294 is about 406.0482806359.

The spelling of 66947294 in words is "sixty-six million, nine hundred forty-seven thousand, two hundred ninety-four".