669062296921 has 4 divisors (see below), whose sum is σ = 677531440000. Its totient is φ = 660593153844.

The previous prime is 669062296913. The next prime is 669062296939. The reversal of 669062296921 is 129692260966.

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 669062296921 - 2³ = 669062296913 is a prime.

It is a super-2 number, since 2×669062296921² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (669062296961) 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, 4234571421 + ... + 4234571578.

It is an arithmetic number, because the mean of its divisors is an integer number (169382860000).

Almost surely, 2^669062296921 is an apocalyptic number.

It is an amenable number.

669062296921 is a deficient number, since it is larger than the sum of its proper divisors (8469143079).

669062296921 is an equidigital number, since it uses as much as digits as its factorization.

669062296921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8469143078.

The product of its (nonzero) digits is 7558272, while the sum is 58.

The spelling of 669062296921 in words is "six hundred sixty-nine billion, sixty-two million, two hundred ninety-six thousand, nine hundred twenty-one".