555222112661 has 4 divisors (see below), whose sum is σ = 573132503424. Its totient is φ = 537311721900.

The previous prime is 555222112651. The next prime is 555222112673. The reversal of 555222112661 is 166211222555.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 555222112661 - 2¹⁸ = 555221850517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (555222112631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8955195335 + ... + 8955195396.

It is an arithmetic number, because the mean of its divisors is an integer number (143283125856).

Almost surely, 2^555222112661 is an apocalyptic number.

It is an amenable number.

555222112661 is a deficient number, since it is larger than the sum of its proper divisors (17910390763).

555222112661 is a wasteful number, since it uses less digits than its factorization.

555222112661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17910390762.

The product of its digits is 72000, while the sum is 38.

The spelling of 555222112661 in words is "five hundred fifty-five billion, two hundred twenty-two million, one hundred twelve thousand, six hundred sixty-one".