10639666 has 8 divisors (see below), whose sum is σ = 15997824. Its totient is φ = 5307060.

The previous prime is 10639663. The next prime is 10639669. The reversal of 10639666 is 66693601.

It is an interprime number because it is at equal distance from previous prime (10639663) and next prime (10639669).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×10639666² = 226404985183112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10639663) 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, 5310 + ... + 7033.

It is an arithmetic number, because the mean of its divisors is an integer number (1999728).

Almost surely, 2^10639666 is an apocalyptic number.

10639666 is a deficient number, since it is larger than the sum of its proper divisors (5358158).

10639666 is a wasteful number, since it uses less digits than its factorization.

10639666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12776.

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 10639666 is about 3261.8500885234. The cubic root of 10639666 is about 219.9425883248.

The spelling of 10639666 in words is "ten million, six hundred thirty-nine thousand, six hundred sixty-six".