669287841 has 16 divisors (see below), whose sum is σ = 952326144. Its totient is φ = 416634624.

The previous prime is 669287821. The next prime is 669287851. The reversal of 669287841 is 148782966.

It is not a de Polignac number, because 669287841 - 2⁹ = 669287329 is a prime.

It is a super-2 number, since 2×669287841² = 895892428220882562, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (669287821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45190 + ... + 58143.

It is an arithmetic number, because the mean of its divisors is an integer number (59520384).

Almost surely, 2^669287841 is an apocalyptic number.

It is an amenable number.

669287841 is a deficient number, since it is larger than the sum of its proper divisors (283038303).

669287841 is a wasteful number, since it uses less digits than its factorization.

669287841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103480.

The product of its digits is 1161216, while the sum is 51.

The square root of 669287841 is about 25870.5980023655. The cubic root of 669287841 is about 874.7238708558.

The spelling of 669287841 in words is "six hundred sixty-nine million, two hundred eighty-seven thousand, eight hundred forty-one".