6444390966 has 32 divisors (see below), whose sum is σ = 13884702720. Its totient is φ = 1982250144.

The previous prime is 6444390961. The next prime is 6444391003. The reversal of 6444390966 is 6690934446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6444390961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 267945 + ... + 291003.

It is an arithmetic number, because the mean of its divisors is an integer number (433896960).

Almost surely, 2^6444390966 is an apocalyptic number.

6444390966 is an abundant number, since it is smaller than the sum of its proper divisors (7440311754).

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

6444390966 is a wasteful number, since it uses less digits than its factorization.

6444390966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26660.

The product of its (nonzero) digits is 3359232, while the sum is 51.

The square root of 6444390966 is about 80276.9641055266. The cubic root of 6444390966 is about 1860.9182429892.

The spelling of 6444390966 in words is "six billion, four hundred forty-four million, three hundred ninety thousand, nine hundred sixty-six".