6629638 has 4 divisors (see below), whose sum is σ = 9944460. Its totient is φ = 3314818.

The previous prime is 6629627. The next prime is 6629647. The reversal of 6629638 is 8369266.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8369266 = 2 ⋅4184633.

It is a super-2 number, since 2×6629638² = 87904200022088, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6629638.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1657408 + ... + 1657411.

It is an arithmetic number, because the mean of its divisors is an integer number (2486115).

Almost surely, 2^6629638 is an apocalyptic number.

6629638 is a deficient number, since it is larger than the sum of its proper divisors (3314822).

6629638 is a wasteful number, since it uses less digits than its factorization.

6629638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3314821.

The product of its digits is 93312, while the sum is 40.

The square root of 6629638 is about 2574.8083423820. The cubic root of 6629638 is about 187.8581055461.

The spelling of 6629638 in words is "six million, six hundred twenty-nine thousand, six hundred thirty-eight".