22766720173 has 4 divisors (see below), whose sum is σ = 22767472960. Its totient is φ = 22765967388.

The previous prime is 22766720129. The next prime is 22766720191. The reversal of 22766720173 is 37102766722.

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 a de Polignac number, because none of the positive numbers 2^k-22766720173 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 (22766720573) 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, 329043 + ... + 392176.

It is an arithmetic number, because the mean of its divisors is an integer number (5691868240).

Almost surely, 2^22766720173 is an apocalyptic number.

It is an amenable number.

22766720173 is a deficient number, since it is larger than the sum of its proper divisors (752787).

22766720173 is an equidigital number, since it uses as much as digits as its factorization.

22766720173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752786.

The product of its (nonzero) digits is 296352, while the sum is 43.

The spelling of 22766720173 in words is "twenty-two billion, seven hundred sixty-six million, seven hundred twenty thousand, one hundred seventy-three".