6666372 has 18 divisors (see below), whose sum is σ = 16851198. Its totient is φ = 2222112.

The previous prime is 6666353. The next prime is 6666379. The reversal of 6666372 is 2736666.

6666372 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 5447556 + 1218816 = 2334^2 + 1104^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 185177 = 6666372 / (6 + 6 + 6 + 6 + 3 + 7 + 2).

It is not an unprimeable number, because it can be changed into a prime (6666379) 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, 92553 + ... + 92624.

Almost surely, 2^6666372 is an apocalyptic number.

It is an amenable number.

6666372 is an abundant number, since it is smaller than the sum of its proper divisors (10184826).

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

6666372 is a wasteful number, since it uses less digits than its factorization.

6666372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185187 (or 185182 counting only the distinct ones).

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

The square root of 6666372 is about 2581.9318348864. The cubic root of 6666372 is about 188.2044328159.

The spelling of 6666372 in words is "six million, six hundred sixty-six thousand, three hundred seventy-two".