22757661 has 6 divisors (see below), whose sum is σ = 32872190. Its totient is φ = 15171768.

The previous prime is 22757659. The next prime is 22757671. The reversal of 22757661 is 16675722.

22757661 is a `hidden beast` number, since 2 + 27 + 576 + 61 = 666.

It can be written as a sum of positive squares in only one way, i.e., 22752900 + 4761 = 4770^2 + 69^2 .

It is not a de Polignac number, because 22757661 - 2¹ = 22757659 is a prime.

It is a super-2 number, since 2×22757661² = 1035822268381842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22757641) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1264306 + ... + 1264323.

Almost surely, 2^22757661 is an apocalyptic number.

It is an amenable number.

22757661 is a deficient number, since it is larger than the sum of its proper divisors (10114529).

22757661 is a wasteful number, since it uses less digits than its factorization.

22757661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2528635 (or 2528632 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 22757661 is about 4770.4990304998. The cubic root of 22757661 is about 283.3843579002.

The spelling of 22757661 in words is "twenty-two million, seven hundred fifty-seven thousand, six hundred sixty-one".