7998669 has 20 divisors (see below), whose sum is σ = 13656544. Its totient is φ = 4570344.

The previous prime is 7998667. The next prime is 7998673. The reversal of 7998669 is 9668997.

It is not a de Polignac number, because 7998669 - 2¹ = 7998667 is a prime.

It is a super-2 number, since 2×7998669² = 127957411543122, which contains 22 as substring.

It is a Duffinian number.

7998669 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7998667) 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, 6487 + ... + 7620.

Almost surely, 2^7998669 is an apocalyptic number.

It is an amenable number.

7998669 is a deficient number, since it is larger than the sum of its proper divisors (5657875).

7998669 is a wasteful number, since it uses less digits than its factorization.

7998669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14126 (or 14117 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 54.

The square root of 7998669 is about 2828.1918251774. The cubic root of 7998669 is about 199.9889077182.

The spelling of 7998669 in words is "seven million, nine hundred ninety-eight thousand, six hundred sixty-nine".