676106721 has 12 divisors (see below), whose sum is σ = 983154900. Its totient is φ = 447711840.

The previous prime is 676106707. The next prime is 676106741. The reversal of 676106721 is 127601676.

It can be written as a sum of positive squares in 2 ways, for example, as 445674321 + 230432400 = 21111^2 + 15180^2 .

It is not a de Polignac number, because 676106721 - 2¹⁰ = 676105697 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (676106741) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 250750 + ... + 253431.

It is an arithmetic number, because the mean of its divisors is an integer number (81929575).

Almost surely, 2^676106721 is an apocalyptic number.

It is an amenable number.

676106721 is a deficient number, since it is larger than the sum of its proper divisors (307048179).

676106721 is a wasteful number, since it uses less digits than its factorization.

676106721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504336 (or 504333 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 676106721 is about 26002.0522459286. The cubic root of 676106721 is about 877.6844777361.

The spelling of 676106721 in words is "six hundred seventy-six million, one hundred six thousand, seven hundred twenty-one".