1669612816 has 20 divisors (see below), whose sum is σ = 3259572624. Its totient is φ = 828432800.

The previous prime is 1669612807. The next prime is 1669612829. The reversal of 1669612816 is 6182169661.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 396190 + ... + 400381.

Almost surely, 2^1669612816 is an apocalyptic number.

1669612816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1669612816 is a deficient number, since it is larger than the sum of its proper divisors (1589959808).

1669612816 is a wasteful number, since it uses less digits than its factorization.

1669612816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796710 (or 796704 counting only the distinct ones).

The product of its digits is 186624, while the sum is 46.

The square root of 1669612816 is about 40860.8959275246. The cubic root of 1669612816 is about 1186.3292995149.

The spelling of 1669612816 in words is "one billion, six hundred sixty-nine million, six hundred twelve thousand, eight hundred sixteen".