6690050921689 has 4 divisors (see below), whose sum is σ = 6690141667456. Its totient is φ = 6689960175924.

The previous prime is 6690050921683. The next prime is 6690050921747. The reversal of 6690050921689 is 9861290500966.

6690050921689 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 6690050921689 - 2²³ = 6690042533081 is a prime.

It is a super-2 number, since 2×6690050921689² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6690050921683) 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, 45262209 + ... + 45409774.

It is an arithmetic number, because the mean of its divisors is an integer number (1672535416864).

Almost surely, 2^{6690050921689} is an apocalyptic number.

It is an amenable number.

6690050921689 is a deficient number, since it is larger than the sum of its proper divisors (90745767).

6690050921689 is an equidigital number, since it uses as much as digits as its factorization.

6690050921689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90745766.

The product of its (nonzero) digits is 12597120, while the sum is 61.

The spelling of 6690050921689 in words is "six trillion, six hundred ninety billion, fifty million, nine hundred twenty-one thousand, six hundred eighty-nine".