1669612818 has 16 divisors (see below), whose sum is σ = 3446942976. Its totient is φ = 538584720.

The previous prime is 1669612807. The next prime is 1669612829. The reversal of 1669612818 is 8182169661.

It is an interprime number because it is at equal distance from previous prime (1669612807) and next prime (1669612829).

It is a super-2 number, since 2×1669612818² = 5575213924059802248, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4488021 + ... + 4488392.

It is an arithmetic number, because the mean of its divisors is an integer number (215433936).

Almost surely, 2^1669612818 is an apocalyptic number.

1669612818 is an abundant number, since it is smaller than the sum of its proper divisors (1777330158).

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

1669612818 is a wasteful number, since it uses less digits than its factorization.

1669612818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8976449.

The product of its digits is 248832, while the sum is 48.

The square root of 1669612818 is about 40860.8959519979. The cubic root of 1669612818 is about 1186.3292999886.

The spelling of 1669612818 in words is "one billion, six hundred sixty-nine million, six hundred twelve thousand, eight hundred eighteen".