669825133 has 2 divisors, whose sum is σ = 669825134. Its totient is φ = 669825132.

The previous prime is 669825131. The next prime is 669825193. The reversal of 669825133 is 331528966.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 615684969 + 54140164 = 24813^2 + 7358^2 .

It is a cyclic number.

It is not a de Polignac number, because 669825133 - 2¹ = 669825131 is a prime.

Together with 669825131, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 669825133.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (669825131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334912566 + 334912567.

It is an arithmetic number, because the mean of its divisors is an integer number (334912567).

Almost surely, 2^669825133 is an apocalyptic number.

It is an amenable number.

669825133 is a deficient number, since it is larger than the sum of its proper divisors (1).

669825133 is an equidigital number, since it uses as much as digits as its factorization.

669825133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 43.

The square root of 669825133 is about 25880.9801398633. The cubic root of 669825133 is about 874.9578790064.

The spelling of 669825133 in words is "six hundred sixty-nine million, eight hundred twenty-five thousand, one hundred thirty-three".