6646371 has 20 divisors (see below), whose sum is σ = 9904392. Its totient is φ = 3950784.

The previous prime is 6646363. The next prime is 6646373. The reversal of 6646371 is 1736466.

It is not a de Polignac number, because 6646371 - 2³ = 6646363 is a prime.

Its product of digits (18144) is a multiple of the sum of its prime factors (96).

It is not an unprimeable number, because it can be changed into a prime (6646373) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 349800 + ... + 349818.

Almost surely, 2^6646371 is an apocalyptic number.

6646371 is a deficient number, since it is larger than the sum of its proper divisors (3258021).

6646371 is an frugal number, since it uses more digits than its factorization.

6646371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96 (or 39 counting only the distinct ones).

The product of its digits is 18144, while the sum is 33.

The square root of 6646371 is about 2578.0556627040. The cubic root of 6646371 is about 188.0160220991.

The spelling of 6646371 in words is "six million, six hundred forty-six thousand, three hundred seventy-one".