6663672 has 24 divisors (see below), whose sum is σ = 18047640. Its totient is φ = 2221200.

The previous prime is 6663653. The next prime is 6663673. The reversal of 6663672 is 2763666.

It is a tau number, because it is divible by the number of its divisors (24).

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

It is a d-powerful number, because it can be written as 6 + 6⁷ + 6⁷ + 3¹⁰ + 6⁷ + 7⁸ + 2³ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6663673) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 46204 + ... + 46347.

It is an arithmetic number, because the mean of its divisors is an integer number (751985).

Almost surely, 2^6663672 is an apocalyptic number.

It is an amenable number.

6663672 is an abundant number, since it is smaller than the sum of its proper divisors (11383968).

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

6663672 is a wasteful number, since it uses less digits than its factorization.

6663672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92563 (or 92556 counting only the distinct ones).

The product of its digits is 54432, while the sum is 36.

The square root of 6663672 is about 2581.4089176262. The cubic root of 6663672 is about 188.1790206633.

The spelling of 6663672 in words is "six million, six hundred sixty-three thousand, six hundred seventy-two".