7666240 has 28 divisors (see below), whose sum is σ = 18255996. Its totient is φ = 3066368.

The previous prime is 7666213. The next prime is 7666247. The reversal of 7666240 is 426667.

It can be written as a sum of positive squares in 2 ways, for example, as 4596736 + 3069504 = 2144^2 + 1752^2 .

It is not an unprimeable number, because it can be changed into a prime (7666247) 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, 11659 + ... + 12298.

Almost surely, 2^7666240 is an apocalyptic number.

It is an amenable number.

7666240 is an abundant number, since it is smaller than the sum of its proper divisors (10589756).

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

7666240 is a wasteful number, since it uses less digits than its factorization.

7666240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23974 (or 23964 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 7666240 is about 2768.7975729547. The cubic root of 7666240 is about 197.1790653731.

The spelling of 7666240 in words is "seven million, six hundred sixty-six thousand, two hundred forty".