21766676601 has 4 divisors (see below), whose sum is σ = 29022235472. Its totient is φ = 14511117732.

The previous prime is 21766676593. The next prime is 21766676611. The reversal of 21766676601 is 10667666712.

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 not a de Polignac number, because 21766676601 - 2³ = 21766676593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21766676611) 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, 3627779431 + ... + 3627779436.

It is an arithmetic number, because the mean of its divisors is an integer number (7255558868).

Almost surely, 2^21766676601 is an apocalyptic number.

It is an amenable number.

21766676601 is a deficient number, since it is larger than the sum of its proper divisors (7255558871).

21766676601 is an equidigital number, since it uses as much as digits as its factorization.

21766676601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7255558870.

The product of its (nonzero) digits is 762048, while the sum is 48.

The spelling of 21766676601 in words is "twenty-one billion, seven hundred sixty-six million, six hundred seventy-six thousand, six hundred one".