1669818994 has 8 divisors (see below), whose sum is σ = 2515666860. Its totient is φ = 831263376.

The previous prime is 1669818989. The next prime is 1669819027. The reversal of 1669818994 is 4998189661.

It can be written as a sum of positive squares in 2 ways, for example, as 1669784769 + 34225 = 40863^2 + 185^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 1822489 + ... + 1823404.

Almost surely, 2^1669818994 is an apocalyptic number.

1669818994 is a deficient number, since it is larger than the sum of its proper divisors (845847866).

1669818994 is a wasteful number, since it uses less digits than its factorization.

1669818994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3646124.

The product of its digits is 6718464, while the sum is 61.

The square root of 1669818994 is about 40863.4187752322. The cubic root of 1669818994 is about 1186.3781301844.

The spelling of 1669818994 in words is "one billion, six hundred sixty-nine million, eight hundred eighteen thousand, nine hundred ninety-four".