66943294 has 16 divisors (see below), whose sum is σ = 114307200. Its totient is φ = 29105560.

The previous prime is 66943277. The next prime is 66943301. The reversal of 66943294 is 49234966.

It is a super-2 number, since 2×66943294² = 8962809223140872, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66943294.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 65644 + ... + 66655.

It is an arithmetic number, because the mean of its divisors is an integer number (7144200).

Almost surely, 2^66943294 is an apocalyptic number.

66943294 is a deficient number, since it is larger than the sum of its proper divisors (47363906).

66943294 is a wasteful number, since it uses less digits than its factorization.

66943294 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132335.

The product of its digits is 279936, while the sum is 43.

The square root of 66943294 is about 8181.8881683875. Note that the first 3 decimals coincide. The cubic root of 66943294 is about 406.0401935504.

The spelling of 66943294 in words is "sixty-six million, nine hundred forty-three thousand, two hundred ninety-four".