1669294395 has 12 divisors (see below), whose sum is σ = 2893443696. Its totient is φ = 890290320.

The previous prime is 1669294339. The next prime is 1669294397. The reversal of 1669294395 is 5934929661.

1669294395 is a `hidden beast` number, since 166 + 9 + 2 + 94 + 395 = 666.

It is not a de Polignac number, because 1669294395 - 2¹⁸ = 1669032251 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1669294397) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18547671 + ... + 18547760.

It is an arithmetic number, because the mean of its divisors is an integer number (241120308).

Almost surely, 2^1669294395 is an apocalyptic number.

1669294395 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1669294395 is a deficient number, since it is larger than the sum of its proper divisors (1224149301).

1669294395 is a wasteful number, since it uses less digits than its factorization.

1669294395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37095442 (or 37095439 counting only the distinct ones).

The product of its digits is 3149280, while the sum is 54.

The square root of 1669294395 is about 40856.9993391585. Note that the first 3 decimals coincide. The cubic root of 1669294395 is about 1186.2538776016.

Adding to 1669294395 its sum of digits (54), we get a square (1669294449 = 40857²).

The spelling of 1669294395 in words is "one billion, six hundred sixty-nine million, two hundred ninety-four thousand, three hundred ninety-five".