669885527 has 12 divisors (see below), whose sum is σ = 749067720. Its totient is φ = 597292416.

The previous prime is 669885509. The next prime is 669885547. The reversal of 669885527 is 725588966.

It is not a de Polignac number, because 669885527 - 2¹⁴ = 669869143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669885547) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55508 + ... + 66489.

It is an arithmetic number, because the mean of its divisors is an integer number (62422310).

Almost surely, 2^669885527 is an apocalyptic number.

669885527 is a deficient number, since it is larger than the sum of its proper divisors (79182193).

669885527 is a wasteful number, since it uses less digits than its factorization.

669885527 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122050 (or 122033 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 56.

The square root of 669885527 is about 25882.1468777225. The cubic root of 669885527 is about 874.9841747342.

It can be divided in two parts, 66988552 and 7, that multiplied together give a palindrome (468919864).

The spelling of 669885527 in words is "six hundred sixty-nine million, eight hundred eighty-five thousand, five hundred twenty-seven".