1669611408 has 20 divisors (see below), whose sum is σ = 4313162928. Its totient is φ = 556537120.

The previous prime is 1669611401. The next prime is 1669611451. The reversal of 1669611408 is 8041169661.

It is a self number, because there is not a number n which added to its sum of digits gives 1669611408.

It is not an unprimeable number, because it can be changed into a prime (1669611401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17391738 + ... + 17391833.

Almost surely, 2^1669611408 is an apocalyptic number.

It is an amenable number.

1669611408 is an abundant number, since it is smaller than the sum of its proper divisors (2643551520).

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

1669611408 is a wasteful number, since it uses less digits than its factorization.

1669611408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34783582 (or 34783576 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 1669611408 is about 40860.8786983344. The cubic root of 1669611408 is about 1186.3289660339.

The spelling of 1669611408 in words is "one billion, six hundred sixty-nine million, six hundred eleven thousand, four hundred eight".