8640662 has 8 divisors (see below), whose sum is σ = 12973656. Its totient is φ = 4316112.

The previous prime is 8640601. The next prime is 8640679. The reversal of 8640662 is 2660468.

It is a happy number.

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

It is a super-2 number, since 2×8640662² = 149322079596488, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2258 + ... + 4730.

It is an arithmetic number, because the mean of its divisors is an integer number (1621707).

Almost surely, 2^8640662 is an apocalyptic number.

8640662 is a deficient number, since it is larger than the sum of its proper divisors (4332994).

8640662 is a wasteful number, since it uses less digits than its factorization.

8640662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4222.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 8640662 is about 2939.5002976697. The cubic root of 8640662 is about 205.2023542270.

It can be divided in two parts, 86406 and 62, that added together give a palindrome (86468).

The spelling of 8640662 in words is "eight million, six hundred forty thousand, six hundred sixty-two".