276000661 has 8 divisors (see below), whose sum is σ = 297027864. Its totient is φ = 255505920.

The previous prime is 276000653. The next prime is 276000679. The reversal of 276000661 is 166000672.

It can be written as a sum of positive squares in 4 ways, for example, as 29322225 + 246678436 = 5415^2 + 15706^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 276000661 - 2³ = 276000653 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 (276000691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132040 + ... + 134113.

It is an arithmetic number, because the mean of its divisors is an integer number (37128483).

Almost surely, 2^276000661 is an apocalyptic number.

It is an amenable number.

276000661 is a deficient number, since it is larger than the sum of its proper divisors (21027203).

276000661 is a wasteful number, since it uses less digits than its factorization.

276000661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266231.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 276000661 is about 16613.2676195865. The cubic root of 276000661 is about 651.0835269178.

The spelling of 276000661 in words is "two hundred seventy-six million, six hundred sixty-one", and thus it is an aban number.