10663639 has 4 divisors (see below), whose sum is σ = 12187024. Its totient is φ = 9140256.

The previous prime is 10663603. The next prime is 10663643. The reversal of 10663639 is 93636601.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 10663639 - 2¹¹ = 10661591 is a prime.

It is a super-2 number, since 2×10663639² = 227426393444642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10663139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 761682 + ... + 761695.

It is an arithmetic number, because the mean of its divisors is an integer number (3046756).

Almost surely, 2^10663639 is an apocalyptic number.

10663639 is a deficient number, since it is larger than the sum of its proper divisors (1523385).

10663639 is an equidigital number, since it uses as much as digits as its factorization.

10663639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1523384.

The product of its (nonzero) digits is 17496, while the sum is 34.

The square root of 10663639 is about 3265.5227759120. The cubic root of 10663639 is about 220.1076539240.

The spelling of 10663639 in words is "ten million, six hundred sixty-three thousand, six hundred thirty-nine".