669168889139 has 2 divisors, whose sum is σ = 669168889140. Its totient is φ = 669168889138.

The previous prime is 669168889099. The next prime is 669168889157. The reversal of 669168889139 is 931988861966.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 669168889139 - 2¹² = 669168885043 is a prime.

It is a super-2 number, since 2×669168889139² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (669168889339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334584444569 + 334584444570.

It is an arithmetic number, because the mean of its divisors is an integer number (334584444570).

Almost surely, 2^669168889139 is an apocalyptic number.

669168889139 is a deficient number, since it is larger than the sum of its proper divisors (1).

669168889139 is an equidigital number, since it uses as much as digits as its factorization.

669168889139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241864704, while the sum is 74.

The spelling of 669168889139 in words is "six hundred sixty-nine billion, one hundred sixty-eight million, eight hundred eighty-nine thousand, one hundred thirty-nine".