66868822 has 4 divisors (see below), whose sum is σ = 100303236. Its totient is φ = 33434410.

The previous prime is 66868817. The next prime is 66868849. The reversal of 66868822 is 22886866.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16717204 + ... + 16717207.

It is an arithmetic number, because the mean of its divisors is an integer number (25075809).

Almost surely, 2^66868822 is an apocalyptic number.

66868822 is a deficient number, since it is larger than the sum of its proper divisors (33434414).

66868822 is a wasteful number, since it uses less digits than its factorization.

66868822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33434413.

The product of its digits is 442368, while the sum is 46.

The square root of 66868822 is about 8177.3358742319. The cubic root of 66868822 is about 405.8895693253.

The spelling of 66868822 in words is "sixty-six million, eight hundred sixty-eight thousand, eight hundred twenty-two".