1669105625 has 20 divisors (see below), whose sum is σ = 2275334160. Its totient is φ = 1213890000.

The previous prime is 1669105621. The next prime is 1669105637. The reversal of 1669105625 is 5265019661.

It is not a de Polignac number, because 1669105625 - 2² = 1669105621 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1669105621) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 114515 + ... + 128264.

It is an arithmetic number, because the mean of its divisors is an integer number (113766708).

Almost surely, 2^1669105625 is an apocalyptic number.

It is an amenable number.

1669105625 is a deficient number, since it is larger than the sum of its proper divisors (606228535).

1669105625 is an equidigital number, since it uses as much as digits as its factorization.

1669105625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242810 (or 242795 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 41.

The square root of 1669105625 is about 40854.6891433529. The cubic root of 1669105625 is about 1186.2091605870.

The spelling of 1669105625 in words is "one billion, six hundred sixty-nine million, one hundred five thousand, six hundred twenty-five".