7256660 has 24 divisors (see below), whose sum is σ = 15331680. Its totient is φ = 2885024.

The previous prime is 7256657. The next prime is 7256681. The reversal of 7256660 is 666527.

It is a super-2 number, since 2×7256660² = 105318228711200, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

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, 2567 + ... + 4593.

It is an arithmetic number, because the mean of its divisors is an integer number (638820).

Almost surely, 2^7256660 is an apocalyptic number.

It is an amenable number.

7256660 is an abundant number, since it is smaller than the sum of its proper divisors (8075020).

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

7256660 is a wasteful number, since it uses less digits than its factorization.

7256660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2215 (or 2213 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 7256660 is about 2693.8188506282. The cubic root of 7256660 is about 193.6030783496.

The spelling of 7256660 in words is "seven million, two hundred fifty-six thousand, six hundred sixty".