21766026677707 has 8 divisors (see below), whose sum is σ = 23561788945184. Its totient is φ = 19987614770688.

The previous prime is 21766026677677. The next prime is 21766026677723. The reversal of 21766026677707 is 70777662066712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21766026677707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21766026677107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4337587503 + ... + 4337592520.

It is an arithmetic number, because the mean of its divisors is an integer number (2945223618148).

Almost surely, 2^{21766026677707} is an apocalyptic number.

21766026677707 is a deficient number, since it is larger than the sum of its proper divisors (1795762267477).

21766026677707 is a wasteful number, since it uses less digits than its factorization.

21766026677707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8675180229.

The product of its (nonzero) digits is 87127488, while the sum is 64.

The spelling of 21766026677707 in words is "twenty-one trillion, seven hundred sixty-six billion, twenty-six million, six hundred seventy-seven thousand, seven hundred seven".