669764243063 has 16 divisors (see below), whose sum is σ = 720751728576. Its totient is φ = 620742735360.

The previous prime is 669764243041. The next prime is 669764243081. The reversal of 669764243063 is 360342467966.

It is a cyclic number.

It is not a de Polignac number, because 669764243063 - 2³⁴ = 652584373879 is a prime.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669764243023) 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, 1427756 + ... + 1837937.

It is an arithmetic number, because the mean of its divisors is an integer number (45046983036).

Almost surely, 2^669764243063 is an apocalyptic number.

669764243063 is a deficient number, since it is larger than the sum of its proper divisors (50987485513).

669764243063 is a wasteful number, since it uses less digits than its factorization.

669764243063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3265994.

The product of its (nonzero) digits is 23514624, while the sum is 56.

The spelling of 669764243063 in words is "six hundred sixty-nine billion, seven hundred sixty-four million, two hundred forty-three thousand, sixty-three".