6664629 has 12 divisors (see below), whose sum is σ = 9440864. Its totient is φ = 4181184.

The previous prime is 6664607. The next prime is 6664631. The reversal of 6664629 is 9264666.

It is not a de Polignac number, because 6664629 - 2⁷ = 6664501 is a prime.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a Duffinian number.

6664629 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6664429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2977 + ... + 4710.

Almost surely, 2^6664629 is an apocalyptic number.

It is an amenable number.

6664629 is a deficient number, since it is larger than the sum of its proper divisors (2776235).

6664629 is a wasteful number, since it uses less digits than its factorization.

6664629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7724 (or 7707 counting only the distinct ones).

The product of its digits is 93312, while the sum is 39.

The square root of 6664629 is about 2581.5942748620. The cubic root of 6664629 is about 188.1880286448.

The spelling of 6664629 in words is "six million, six hundred sixty-four thousand, six hundred twenty-nine".