21622067166761 has 4 divisors (see below), whose sum is σ = 21623837883024. Its totient is φ = 21620296450500.

The previous prime is 21622067166757. The next prime is 21622067166781. The reversal of 21622067166761 is 16766176022612.

It is a happy number.

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 21622067166761 - 2² = 21622067166757 is a prime.

It is a super-2 number, since 2×21622067166761² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21622067166701) 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, 885339815 + ... + 885364236.

It is an arithmetic number, because the mean of its divisors is an integer number (5405959470756).

Almost surely, 2^{21622067166761} is an apocalyptic number.

It is an amenable number.

21622067166761 is a deficient number, since it is larger than the sum of its proper divisors (1770716263).

21622067166761 is a wasteful number, since it uses less digits than its factorization.

21622067166761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1770716262.

The product of its (nonzero) digits is 3048192, while the sum is 53.

The spelling of 21622067166761 in words is "twenty-one trillion, six hundred twenty-two billion, sixty-seven million, one hundred sixty-six thousand, seven hundred sixty-one".