669334686433967 has 32 divisors (see below), whose sum is σ = 690613554193920. Its totient is φ = 648313077588480.

The previous prime is 669334686433961. The next prime is 669334686433969. The reversal of 669334686433967 is 769334686433966.

It is a cyclic number.

It is not a de Polignac number, because 669334686433967 - 2³⁴ = 669317506564783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669334686433961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3452805038 + ... + 3452998884.

It is an arithmetic number, because the mean of its divisors is an integer number (21581673568560).

Almost surely, 2^{669334686433967} is an apocalyptic number.

669334686433967 is a deficient number, since it is larger than the sum of its proper divisors (21278867759953).

669334686433967 is a wasteful number, since it uses less digits than its factorization.

669334686433967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195263.

The product of its digits is 45712429056, while the sum is 83.

Subtracting 669334686433967 from its reverse (769334686433966), we obtain a palindrome (99999999999999).

The spelling of 669334686433967 in words is "six hundred sixty-nine trillion, three hundred thirty-four billion, six hundred eighty-six million, four hundred thirty-three thousand, nine hundred sixty-seven".