6666472 has 8 divisors (see below), whose sum is σ = 12499650. Its totient is φ = 3333232.

The previous prime is 6666467. The next prime is 6666479. The reversal of 6666472 is 2746666.

It can be written as a sum of positive squares in only one way, i.e., 4778596 + 1887876 = 2186^2 + 1374^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (6666479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 416647 + ... + 416662.

Almost surely, 2^6666472 is an apocalyptic number.

It is an amenable number.

6666472 is a deficient number, since it is larger than the sum of its proper divisors (5833178).

6666472 is a wasteful number, since it uses less digits than its factorization.

6666472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833315 (or 833311 counting only the distinct ones).

The product of its digits is 72576, while the sum is 37.

The square root of 6666472 is about 2581.9512001585. The cubic root of 6666472 is about 188.2053738749.

Subtracting from 6666472 its product of digits (72576), we obtain a triangular number (6593896 = T₃₆₃₁).

The spelling of 6666472 in words is "six million, six hundred sixty-six thousand, four hundred seventy-two".