7656681 has 8 divisors (see below), whose sum is σ = 10809504. Its totient is φ = 4804160.

The previous prime is 7656679. The next prime is 7656689. The reversal of 7656681 is 1866567.

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

It is a cyclic number.

It is not a de Polignac number, because 7656681 - 2¹ = 7656679 is a prime.

It is a super-2 number, since 2×7656681² = 117249527871522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7656689) 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, 75015 + ... + 75116.

It is an arithmetic number, because the mean of its divisors is an integer number (1351188).

Almost surely, 2^7656681 is an apocalyptic number.

It is an amenable number.

7656681 is a deficient number, since it is larger than the sum of its proper divisors (3152823).

7656681 is a wasteful number, since it uses less digits than its factorization.

7656681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150151.

The product of its digits is 60480, while the sum is 39.

The square root of 7656681 is about 2767.0708339325. The cubic root of 7656681 is about 197.0970773918.

The spelling of 7656681 in words is "seven million, six hundred fifty-six thousand, six hundred eighty-one".