669349943967 has 8 divisors (see below), whose sum is σ = 899279314560. Its totient is φ = 442826934680.

The previous prime is 669349943881. The next prime is 669349943993. The reversal of 669349943967 is 769349943966.

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

It is not a de Polignac number, because 669349943967 - 2²⁴ = 669333166751 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669349943267) 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, 851589867 + ... + 851590652.

It is an arithmetic number, because the mean of its divisors is an integer number (112409914320).

Almost surely, 2^669349943967 is an apocalyptic number.

669349943967 is a deficient number, since it is larger than the sum of its proper divisors (229929370593).

669349943967 is a wasteful number, since it uses less digits than its factorization.

669349943967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1703180653.

The product of its digits is 1428513408, while the sum is 75.

Subtracting 669349943967 from its reverse (769349943966), we obtain a palindrome (99999999999).

The spelling of 669349943967 in words is "six hundred sixty-nine billion, three hundred forty-nine million, nine hundred forty-three thousand, nine hundred sixty-seven".