669287441 has 2 divisors, whose sum is σ = 669287442. Its totient is φ = 669287440.

The previous prime is 669287431. The next prime is 669287453. The reversal of 669287441 is 144782966.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 665846416 + 3441025 = 25804^2 + 1855^2 .

It is a cyclic number.

It is not a de Polignac number, because 669287441 - 2¹⁰ = 669286417 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (669287431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334643720 + 334643721.

It is an arithmetic number, because the mean of its divisors is an integer number (334643721).

Almost surely, 2^669287441 is an apocalyptic number.

It is an amenable number.

669287441 is a deficient number, since it is larger than the sum of its proper divisors (1).

669287441 is an equidigital number, since it uses as much as digits as its factorization.

669287441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 47.

The square root of 669287441 is about 25870.5902715806. The cubic root of 669287441 is about 874.7236965961.

The spelling of 669287441 in words is "six hundred sixty-nine million, two hundred eighty-seven thousand, four hundred forty-one".