669287492089 has 16 divisors (see below), whose sum is σ = 680878083600. Its totient is φ = 657816090624.

The previous prime is 669287492077. The next prime is 669287492099. The reversal of 669287492089 is 980294782966.

It can be written as a sum of positive squares in 8 ways, for example, as 107507261689 + 561780230400 = 327883^2 + 749520^2 .

It is a cyclic number.

It is not a de Polignac number, because 669287492089 - 2⁹ = 669287491577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (669287492059) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7190157 + ... + 7282645.

It is an arithmetic number, because the mean of its divisors is an integer number (42554880225).

Almost surely, 2^669287492089 is an apocalyptic number.

It is an amenable number.

669287492089 is a deficient number, since it is larger than the sum of its proper divisors (11590591511).

669287492089 is a wasteful number, since it uses less digits than its factorization.

669287492089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93132.

The product of its (nonzero) digits is 188116992, while the sum is 70.

The spelling of 669287492089 in words is "six hundred sixty-nine billion, two hundred eighty-seven million, four hundred ninety-two thousand, eighty-nine".