7676721 has 16 divisors (see below), whose sum is σ = 12248320. Its totient is φ = 4723920.

The previous prime is 7676719. The next prime is 7676743. The reversal of 7676721 is 1276767.

It is not a de Polignac number, because 7676721 - 2¹ = 7676719 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7676791) 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 15 ways as a sum of consecutive naturals, for example, 10585 + ... + 11286.

It is an arithmetic number, because the mean of its divisors is an integer number (765520).

Almost surely, 2^7676721 is an apocalyptic number.

It is an amenable number.

7676721 is a deficient number, since it is larger than the sum of its proper divisors (4571599).

7676721 is a wasteful number, since it uses less digits than its factorization.

7676721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21893 (or 21887 counting only the distinct ones).

The product of its digits is 24696, while the sum is 36.

The square root of 7676721 is about 2770.6896253460. The cubic root of 7676721 is about 197.2688830973.

The spelling of 7676721 in words is "seven million, six hundred seventy-six thousand, seven hundred twenty-one".