7680657 has 4 divisors (see below), whose sum is σ = 10240880. Its totient is φ = 5120436.

The previous prime is 7680649. The next prime is 7680667. The reversal of 7680657 is 7560867.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 7680657 - 2³ = 7680649 is a prime.

It is a Duffinian number.

7680657 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7680637) 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, 1280107 + ... + 1280112.

It is an arithmetic number, because the mean of its divisors is an integer number (2560220).

Almost surely, 2^7680657 is an apocalyptic number.

It is an amenable number.

7680657 is a deficient number, since it is larger than the sum of its proper divisors (2560223).

7680657 is a wasteful number, since it uses less digits than its factorization.

7680657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2560222.

The product of its (nonzero) digits is 70560, while the sum is 39.

The square root of 7680657 is about 2771.3998268023. The cubic root of 7680657 is about 197.3025918323.

The spelling of 7680657 in words is "seven million, six hundred eighty thousand, six hundred fifty-seven".