676206621 has 6 divisors (see below), whose sum is σ = 976742910. Its totient is φ = 450804408.

The previous prime is 676206617. The next prime is 676206631. The reversal of 676206621 is 126602676.

676206621 is a `hidden beast` number, since 6 + 7 + 6 + 20 + 6 + 621 = 666.

It can be written as a sum of positive squares in only one way, i.e., 638825625 + 37380996 = 25275^2 + 6114^2 .

It is not a de Polignac number, because 676206621 - 2² = 676206617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (676206631) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37567026 + ... + 37567043.

It is an arithmetic number, because the mean of its divisors is an integer number (162790485).

Almost surely, 2^676206621 is an apocalyptic number.

It is an amenable number.

676206621 is a deficient number, since it is larger than the sum of its proper divisors (300536289).

676206621 is a wasteful number, since it uses less digits than its factorization.

676206621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75134075 (or 75134072 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 676206621 is about 26003.9731771897. The cubic root of 676206621 is about 877.7277038317.

The spelling of 676206621 in words is "six hundred seventy-six million, two hundred six thousand, six hundred twenty-one".