676757621 has 4 divisors (see below), whose sum is σ = 698588544. Its totient is φ = 654926700.

The previous prime is 676757611. The next prime is 676757623. The reversal of 676757621 is 126757676.

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 a cyclic number.

It is not a de Polignac number, because 676757621 - 2¹⁴ = 676741237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (676757623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10915415 + ... + 10915476.

It is an arithmetic number, because the mean of its divisors is an integer number (174647136).

Almost surely, 2^676757621 is an apocalyptic number.

It is an amenable number.

676757621 is a deficient number, since it is larger than the sum of its proper divisors (21830923).

676757621 is a wasteful number, since it uses less digits than its factorization.

676757621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21830922.

The product of its digits is 740880, while the sum is 47.

The square root of 676757621 is about 26014.5655547042. The cubic root of 676757621 is about 877.9660415672.

Subtracting from 676757621 its reverse (126757676), we obtain a palindrome (549999945).

The spelling of 676757621 in words is "six hundred seventy-six million, seven hundred fifty-seven thousand, six hundred twenty-one".