6645650 has 48 divisors (see below), whose sum is σ = 13847328. Its totient is φ = 2352000.

The previous prime is 6645641. The next prime is 6645677. The reversal of 6645650 is 565466.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23510 + ... + 23790.

It is an arithmetic number, because the mean of its divisors is an integer number (288486).

Almost surely, 2^6645650 is an apocalyptic number.

6645650 is an abundant number, since it is smaller than the sum of its proper divisors (7201678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6645650 is a wasteful number, since it uses less digits than its factorization.

6645650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347 (or 342 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 6645650 is about 2577.9158248477. The cubic root of 6645650 is about 188.0092231781.

The spelling of 6645650 in words is "six million, six hundred forty-five thousand, six hundred fifty".