669494311 has 2 divisors, whose sum is σ = 669494312. Its totient is φ = 669494310.

The previous prime is 669494303. The next prime is 669494333. The reversal of 669494311 is 113494966.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 669494311 - 2³ = 669494303 is a prime.

It is a super-2 number, since 2×669494311² = 896445264922729442, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (669494381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334747155 + 334747156.

It is an arithmetic number, because the mean of its divisors is an integer number (334747156).

Almost surely, 2^669494311 is an apocalyptic number.

669494311 is a deficient number, since it is larger than the sum of its proper divisors (1).

669494311 is an equidigital number, since it uses as much as digits as its factorization.

669494311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 43.

The square root of 669494311 is about 25874.5881319877. The cubic root of 669494311 is about 874.8138100708.

The spelling of 669494311 in words is "six hundred sixty-nine million, four hundred ninety-four thousand, three hundred eleven".