669828898 has 4 divisors (see below), whose sum is σ = 1004743350. Its totient is φ = 334914448.

The previous prime is 669828889. The next prime is 669828899. The reversal of 669828898 is 898828966.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 637714009 + 32114889 = 25253^2 + 5667^2 .

It is not an unprimeable number, because it can be changed into a prime (669828899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167457223 + ... + 167457226.

Almost surely, 2^669828898 is an apocalyptic number.

669828898 is a deficient number, since it is larger than the sum of its proper divisors (334914452).

669828898 is a wasteful number, since it uses less digits than its factorization.

669828898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334914451.

The product of its digits is 23887872, while the sum is 64.

The square root of 669828898 is about 25881.0528765736. The cubic root of 669828898 is about 874.9595183448.

The spelling of 669828898 in words is "six hundred sixty-nine million, eight hundred twenty-eight thousand, eight hundred ninety-eight".