669528798 has 16 divisors (see below), whose sum is σ = 1352316816. Its totient is φ = 220966400.

The previous prime is 669528767. The next prime is 669528803. The reversal of 669528798 is 897825966.

It is a happy number.

It is a super-2 number, since 2×669528798² = 896537622702649608, which contains 22 as substring.

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 in 7 ways as a sum of consecutive naturals, for example, 551811 + ... + 553022.

It is an arithmetic number, because the mean of its divisors is an integer number (84519801).

Almost surely, 2^669528798 is an apocalyptic number.

669528798 is an abundant number, since it is smaller than the sum of its proper divisors (682788018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

669528798 is a wasteful number, since it uses less digits than its factorization.

669528798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1104939.

The product of its digits is 13063680, while the sum is 60.

The square root of 669528798 is about 25875.2545494726. The cubic root of 669528798 is about 874.8288309532.

The spelling of 669528798 in words is "six hundred sixty-nine million, five hundred twenty-eight thousand, seven hundred ninety-eight".