66942394 has 8 divisors (see below), whose sum is σ = 100512288. Its totient is φ = 33438300.

The previous prime is 66942341. The next prime is 66942427. The reversal of 66942394 is 49324966.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×66942394² = 8962568228902472, 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 66942394.

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 3 ways as a sum of consecutive naturals, for example, 13822 + ... + 18025.

It is an arithmetic number, because the mean of its divisors is an integer number (12564036).

Almost surely, 2^66942394 is an apocalyptic number.

66942394 is a deficient number, since it is larger than the sum of its proper divisors (33569894).

66942394 is a wasteful number, since it uses less digits than its factorization.

66942394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32900.

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

The square root of 66942394 is about 8181.8331686731. The cubic root of 66942394 is about 406.0383739118.

The spelling of 66942394 in words is "sixty-six million, nine hundred forty-two thousand, three hundred ninety-four".