669013874941 has 2 divisors, whose sum is σ = 669013874942. Its totient is φ = 669013874940.

The previous prime is 669013874813. The next prime is 669013874951. The reversal of 669013874941 is 149478310966.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 549346310041 + 119667564900 = 741179^2 + 345930^2 .

It is a cyclic number.

It is not a de Polignac number, because 669013874941 - 2⁷ = 669013874813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (669013874951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334506937470 + 334506937471.

It is an arithmetic number, because the mean of its divisors is an integer number (334506937471).

Almost surely, 2^669013874941 is an apocalyptic number.

It is an amenable number.

669013874941 is a deficient number, since it is larger than the sum of its proper divisors (1).

669013874941 is an equidigital number, since it uses as much as digits as its factorization.

669013874941 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7838208, while the sum is 58.

The spelling of 669013874941 in words is "six hundred sixty-nine billion, thirteen million, eight hundred seventy-four thousand, nine hundred forty-one".