6406672 has 10 divisors (see below), whose sum is σ = 12412958. Its totient is φ = 3203328.

The previous prime is 6406657. The next prime is 6406679. The reversal of 6406672 is 2766046.

It can be written as a sum of positive squares in only one way, i.e., 5740816 + 665856 = 2396^2 + 816^2 .

It is a super-2 number, since 2×6406672² = 82090892231168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6406679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200193 + ... + 200224.

Almost surely, 2^6406672 is an apocalyptic number.

It is an amenable number.

6406672 is a deficient number, since it is larger than the sum of its proper divisors (6006286).

6406672 is a wasteful number, since it uses less digits than its factorization.

6406672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400425 (or 400419 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 6406672 is about 2531.1404544197. The cubic root of 6406672 is about 185.7280490222.

The spelling of 6406672 in words is "six million, four hundred six thousand, six hundred seventy-two".