667311765622 has 4 divisors (see below), whose sum is σ = 1000967648436. Its totient is φ = 333655882810.

The previous prime is 667311765613. The next prime is 667311765647. The reversal of 667311765622 is 226567113766.

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

It is a super-2 number, since 2×667311765622² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 667311765622.

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 as a sum of consecutive naturals, namely, 166827941404 + ... + 166827941407.

It is an arithmetic number, because the mean of its divisors is an integer number (250241912109).

Almost surely, 2^667311765622 is an apocalyptic number.

667311765622 is a deficient number, since it is larger than the sum of its proper divisors (333655882814).

667311765622 is a wasteful number, since it uses less digits than its factorization.

667311765622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333655882813.

The product of its digits is 3810240, while the sum is 52.

The spelling of 667311765622 in words is "six hundred sixty-seven billion, three hundred eleven million, seven hundred sixty-five thousand, six hundred twenty-two".