7207666 has 4 divisors (see below), whose sum is σ = 10811502. Its totient is φ = 3603832.

The previous prime is 7207661. The next prime is 7207667. The reversal of 7207666 is 6667027.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 7177041 + 30625 = 2679^2 + 175^2 .

It is not an unprimeable number, because it can be changed into a prime (7207661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1801915 + ... + 1801918.

Almost surely, 2^7207666 is an apocalyptic number.

7207666 is a deficient number, since it is larger than the sum of its proper divisors (3603836).

7207666 is a wasteful number, since it uses less digits than its factorization.

7207666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3603835.

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 7207666 is about 2684.7096677295. The cubic root of 7207666 is about 193.1663844799.

The spelling of 7207666 in words is "seven million, two hundred seven thousand, six hundred sixty-six".