6466644 has 36 divisors (see below), whose sum is σ = 16432416. Its totient is φ = 2144208.

The previous prime is 6466633. The next prime is 6466661. The reversal of 6466644 is 4466646.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 6466599 and 6466608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9127 + ... + 9809.

It is an arithmetic number, because the mean of its divisors is an integer number (456456).

Almost surely, 2^6466644 is an apocalyptic number.

It is an amenable number.

6466644 is an abundant number, since it is smaller than the sum of its proper divisors (9965772).

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

6466644 is a wasteful number, since it uses less digits than its factorization.

6466644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 956 (or 951 counting only the distinct ones).

The product of its digits is 82944, while the sum is 36.

The square root of 6466644 is about 2542.9596929562. The cubic root of 6466644 is about 186.3057752269.

The spelling of 6466644 in words is "six million, four hundred sixty-six thousand, six hundred forty-four".