76676561 has 4 divisors (see below), whose sum is σ = 82574772. Its totient is φ = 70778352.

The previous prime is 76676557. The next prime is 76676563. The reversal of 76676561 is 16567667.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10758400 + 65918161 = 3280^2 + 8119^2 .

It is a cyclic number.

It is not a de Polignac number, because 76676561 - 2² = 76676557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76676563) 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, 2949086 + ... + 2949111.

It is an arithmetic number, because the mean of its divisors is an integer number (20643693).

Almost surely, 2^76676561 is an apocalyptic number.

It is an amenable number.

76676561 is a deficient number, since it is larger than the sum of its proper divisors (5898211).

76676561 is a wasteful number, since it uses less digits than its factorization.

76676561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5898210.

The product of its digits is 317520, while the sum is 44.

The square root of 76676561 is about 8756.5153457297. The cubic root of 76676561 is about 424.8355737644.

The spelling of 76676561 in words is "seventy-six million, six hundred seventy-six thousand, five hundred sixty-one".