68564222661 has 8 divisors (see below), whose sum is σ = 99729778464. Its totient is φ = 41554074320.

The previous prime is 68564222651. The next prime is 68564222693. The reversal of 68564222661 is 16622246586.

It is a happy number.

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

It is not a de Polignac number, because 68564222661 - 2⁷ = 68564222533 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 68564222661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68564222641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1038851826 + ... + 1038851891.

It is an arithmetic number, because the mean of its divisors is an integer number (12466222308).

Almost surely, 2^68564222661 is an apocalyptic number.

It is an amenable number.

68564222661 is a deficient number, since it is larger than the sum of its proper divisors (31165555803).

68564222661 is a wasteful number, since it uses less digits than its factorization.

68564222661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2077703731.

The product of its digits is 1658880, while the sum is 48.

The spelling of 68564222661 in words is "sixty-eight billion, five hundred sixty-four million, two hundred twenty-two thousand, six hundred sixty-one".