622756881 has 6 divisors (see below), whose sum is σ = 899537730. Its totient is φ = 415171248.

The previous prime is 622756877. The next prime is 622756891. The reversal of 622756881 is 188657226.

622756881 is a `hidden beast` number, since 6 + 2 + 2 + 7 + 568 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 543635856 + 79121025 = 23316^2 + 8895^2 .

It is not a de Polignac number, because 622756881 - 2² = 622756877 is a prime.

It is a super-2 number, since 2×622756881² = 775652265665696322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (622756811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34597596 + ... + 34597613.

It is an arithmetic number, because the mean of its divisors is an integer number (149922955).

Almost surely, 2^622756881 is an apocalyptic number.

It is an amenable number.

622756881 is a deficient number, since it is larger than the sum of its proper divisors (276780849).

622756881 is a wasteful number, since it uses less digits than its factorization.

622756881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69195215 (or 69195212 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 622756881 is about 24955.0972949416. The cubic root of 622756881 is about 853.9638993528.

The spelling of 622756881 in words is "six hundred twenty-two million, seven hundred fifty-six thousand, eight hundred eighty-one".