669141919 has 2 divisors, whose sum is σ = 669141920. Its totient is φ = 669141918.

The previous prime is 669141859. The next prime is 669142021. The reversal of 669141919 is 919141966.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 669141919 - 2¹³ = 669133727 is a prime.

It is a super-2 number, since 2×669141919² = 895501815526005122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (669141019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334570959 + 334570960.

It is an arithmetic number, because the mean of its divisors is an integer number (334570960).

Almost surely, 2^669141919 is an apocalyptic number.

669141919 is a deficient number, since it is larger than the sum of its proper divisors (1).

669141919 is an equidigital number, since it uses as much as digits as its factorization.

669141919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 104976, while the sum is 46.

The square root of 669141919 is about 25867.7776200430. Note that the first 3 decimals coincide. The cubic root of 669141919 is about 874.6602954520.

The spelling of 669141919 in words is "six hundred sixty-nine million, one hundred forty-one thousand, nine hundred nineteen".