669515507 has 2 divisors, whose sum is σ = 669515508. Its totient is φ = 669515506.

The previous prime is 669515501. The next prime is 669515551. The reversal of 669515507 is 705515966.

It is an a-pointer prime, because the next prime (669515551) can be obtained adding 669515507 to its sum of digits (44).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 669515507 - 2¹⁸ = 669253363 is a prime.

It is a super-3 number, since 3×669515507³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (669515501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334757753 + 334757754.

It is an arithmetic number, because the mean of its divisors is an integer number (334757754).

Almost surely, 2^669515507 is an apocalyptic number.

669515507 is a deficient number, since it is larger than the sum of its proper divisors (1).

669515507 is an equidigital number, since it uses as much as digits as its factorization.

669515507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 283500, while the sum is 44.

The square root of 669515507 is about 25874.9977198067. The cubic root of 669515507 is about 874.8230420924.

The spelling of 669515507 in words is "six hundred sixty-nine million, five hundred fifteen thousand, five hundred seven".