1669998066 has 16 divisors (see below), whose sum is σ = 3643632288. Its totient is φ = 506060000.

The previous prime is 1669998059. The next prime is 1669998067. The reversal of 1669998066 is 6608999661.

It is not an unprimeable number, because it can be changed into a prime (1669998067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12651435 + ... + 12651566.

It is an arithmetic number, because the mean of its divisors is an integer number (227727018).

Almost surely, 2^1669998066 is an apocalyptic number.

1669998066 is an abundant number, since it is smaller than the sum of its proper divisors (1973634222).

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

1669998066 is a wasteful number, since it uses less digits than its factorization.

1669998066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25303017.

The product of its (nonzero) digits is 7558272, while the sum is 60.

The square root of 1669998066 is about 40865.6098204835. The cubic root of 1669998066 is about 1186.4205378767.

The spelling of 1669998066 in words is "one billion, six hundred sixty-nine million, nine hundred ninety-eight thousand, sixty-six".