866322199790 has 8 divisors (see below), whose sum is σ = 1559379959640. Its totient is φ = 346528879912.

The previous prime is 866322199781. The next prime is 866322199801. The reversal of 866322199790 is 97991223668.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43316109980 + ... + 43316109999.

It is an arithmetic number, because the mean of its divisors is an integer number (194922494955).

Almost surely, 2^866322199790 is an apocalyptic number.

866322199790 is a deficient number, since it is larger than the sum of its proper divisors (693057759850).

866322199790 is a wasteful number, since it uses less digits than its factorization.

866322199790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86632219986.

The product of its (nonzero) digits is 17635968, while the sum is 62.

The spelling of 866322199790 in words is "eight hundred sixty-six billion, three hundred twenty-two million, one hundred ninety-nine thousand, seven hundred ninety".