1669065630 has 16 divisors (see below), whose sum is σ = 4005757584. Its totient is φ = 445084160.

The previous prime is 1669065613. The next prime is 1669065647. The reversal of 1669065630 is 365609661.

It is an interprime number because it is at equal distance from previous prime (1669065613) and next prime (1669065647).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27817731 + ... + 27817790.

It is an arithmetic number, because the mean of its divisors is an integer number (250359849).

Almost surely, 2^1669065630 is an apocalyptic number.

1669065630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1669065630 is an abundant number, since it is smaller than the sum of its proper divisors (2336691954).

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

1669065630 is a wasteful number, since it uses less digits than its factorization.

1669065630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55635531.

The product of its (nonzero) digits is 174960, while the sum is 42.

The square root of 1669065630 is about 40854.1996617239. The cubic root of 1669065630 is about 1186.1996858891.

The spelling of 1669065630 in words is "one billion, six hundred sixty-nine million, sixty-five thousand, six hundred thirty".