66975722 has 32 divisors (see below), whose sum is σ = 116190720. Its totient is φ = 28635120.

The previous prime is 66975721. The next prime is 66975731. The reversal of 66975722 is 22757966.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (66975721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67643 + ... + 68625.

It is an arithmetic number, because the mean of its divisors is an integer number (3630960).

Almost surely, 2^66975722 is an apocalyptic number.

66975722 is a deficient number, since it is larger than the sum of its proper divisors (49214998).

66975722 is a wasteful number, since it uses less digits than its factorization.

66975722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1178.

The product of its digits is 317520, while the sum is 44.

The square root of 66975722 is about 8183.8696226174. The cubic root of 66975722 is about 406.1057462747.

The spelling of 66975722 in words is "sixty-six million, nine hundred seventy-five thousand, seven hundred twenty-two".