667731763436222 has 16 divisors (see below), whose sum is σ = 1002013094205360. Its totient is φ = 333727422528192.

The previous prime is 667731763436209. The next prime is 667731763436261. The reversal of 667731763436222 is 222634367137766.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50151938 + ... + 62053850.

It is an arithmetic number, because the mean of its divisors is an integer number (62625818387835).

Almost surely, 2^{667731763436222} is an apocalyptic number.

667731763436222 is a deficient number, since it is larger than the sum of its proper divisors (334281330769138).

667731763436222 is a wasteful number, since it uses less digits than its factorization.

667731763436222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11913547.

The product of its digits is 384072192, while the sum is 65.

The spelling of 667731763436222 in words is "six hundred sixty-seven trillion, seven hundred thirty-one billion, seven hundred sixty-three million, four hundred thirty-six thousand, two hundred twenty-two".