22780166761 has 9 divisors (see below), whose sum is σ = 25041181879. Its totient is φ = 20707733200.

The previous prime is 22780166707. The next prime is 22780166807. The reversal of 22780166761 is 16766108722.

It is a happy number.

The square root of 22780166761 is 150931.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 4770526761 + 18009640000 = 69069^2 + 134200^2 .

It is a de Polignac number, because none of the positive numbers 2^k-22780166761 is a prime.

It is a super-2 number, since 2×22780166761² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22780566761) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1653381 + ... + 1667101.

Almost surely, 2^22780166761 is an apocalyptic number.

22780166761 is the 150931-st square number.

22780166761 is the 75466-th centered octagonal number.

It is an amenable number.

22780166761 is a deficient number, since it is larger than the sum of its proper divisors (2261015118).

22780166761 is an frugal number, since it uses more digits than its factorization.

22780166761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27464 (or 13732 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 46.

The spelling of 22780166761 in words is "twenty-two billion, seven hundred eighty million, one hundred sixty-six thousand, seven hundred sixty-one".