7257666 has 16 divisors (see below), whose sum is σ = 15632064. Its totient is φ = 2233104.

The previous prime is 7257659. The next prime is 7257667. The reversal of 7257666 is 6667527.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (7257667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46446 + ... + 46601.

It is an arithmetic number, because the mean of its divisors is an integer number (977004).

Almost surely, 2^7257666 is an apocalyptic number.

7257666 is an abundant number, since it is smaller than the sum of its proper divisors (8374398).

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

7257666 is a wasteful number, since it uses less digits than its factorization.

7257666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93065.

The product of its digits is 105840, while the sum is 39.

The square root of 7257666 is about 2694.0055679230. The cubic root of 7257666 is about 193.6120244165.

The spelling of 7257666 in words is "seven million, two hundred fifty-seven thousand, six hundred sixty-six".