669885526 has 4 divisors (see below), whose sum is σ = 1004828292. Its totient is φ = 334942762.

The previous prime is 669885509. The next prime is 669885547. The reversal of 669885526 is 625588966.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 625588966 = 2 ⋅312794483.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167471380 + ... + 167471383.

It is an arithmetic number, because the mean of its divisors is an integer number (251207073).

Almost surely, 2^669885526 is an apocalyptic number.

669885526 is a deficient number, since it is larger than the sum of its proper divisors (334942766).

669885526 is a wasteful number, since it uses less digits than its factorization.

669885526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334942765.

The product of its digits is 6220800, while the sum is 55.

The square root of 669885526 is about 25882.1468584042. The cubic root of 669885526 is about 874.9841742988.

The spelling of 669885526 in words is "six hundred sixty-nine million, eight hundred eighty-five thousand, five hundred twenty-six".