1669257249 has 8 divisors (see below), whose sum is σ = 2428010592. Its totient is φ = 1011671040.

The previous prime is 1669257241. The next prime is 1669257263. The reversal of 1669257249 is 9427529661.

1669257249 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 1669257249 - 2³ = 1669257241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1669257241) 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, 25291744 + ... + 25291809.

It is an arithmetic number, because the mean of its divisors is an integer number (303501324).

Almost surely, 2^1669257249 is an apocalyptic number.

It is an amenable number.

1669257249 is a deficient number, since it is larger than the sum of its proper divisors (758753343).

1669257249 is a wasteful number, since it uses less digits than its factorization.

1669257249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50583567.

The product of its digits is 1632960, while the sum is 51.

The square root of 1669257249 is about 40856.5447511167. The cubic root of 1669257249 is about 1186.2450784920.

The spelling of 1669257249 in words is "one billion, six hundred sixty-nine million, two hundred fifty-seven thousand, two hundred forty-nine".