7427666 has 8 divisors (see below), whose sum is σ = 11625984. Its totient is φ = 3552340.

The previous prime is 7427663. The next prime is 7427699. The reversal of 7427666 is 6667247.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7427663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80690 + ... + 80781.

It is an arithmetic number, because the mean of its divisors is an integer number (1453248).

Almost surely, 2^7427666 is an apocalyptic number.

7427666 is a deficient number, since it is larger than the sum of its proper divisors (4198318).

7427666 is a wasteful number, since it uses less digits than its factorization.

7427666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161496.

The product of its digits is 84672, while the sum is 38.

The square root of 7427666 is about 2725.3744696830. The cubic root of 7427666 is about 195.1120635724.

The spelling of 7427666 in words is "seven million, four hundred twenty-seven thousand, six hundred sixty-six".