32640663 has 32 divisors (see below), whose sum is σ = 50948352. Its totient is φ = 18368000.

The previous prime is 32640649. The next prime is 32640677. The reversal of 32640663 is 36604623.

It is an interprime number because it is at equal distance from previous prime (32640649) and next prime (32640677).

It is a cyclic number.

It is not a de Polignac number, because 32640663 - 2⁶ = 32640599 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 32640663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32640263) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46213 + ... + 46913.

It is an arithmetic number, because the mean of its divisors is an integer number (1592136).

Almost surely, 2^32640663 is an apocalyptic number.

32640663 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

32640663 is a deficient number, since it is larger than the sum of its proper divisors (18307689).

32640663 is a wasteful number, since it uses less digits than its factorization.

32640663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815.

The product of its (nonzero) digits is 15552, while the sum is 30.

The square root of 32640663 is about 5713.2007666456. The cubic root of 32640663 is about 319.5849534453.

The spelling of 32640663 in words is "thirty-two million, six hundred forty thousand, six hundred sixty-three".