276005681 has 24 divisors (see below), whose sum is σ = 344134080. Its totient is φ = 220141152.

The previous prime is 276005677. The next prime is 276005687. The reversal of 276005681 is 186500672.

It is not a de Polignac number, because 276005681 - 2² = 276005677 is a prime.

It is a super-2 number, since 2×276005681² = 152358271888547522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (276005687) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38390 + ... + 45008.

It is an arithmetic number, because the mean of its divisors is an integer number (14338920).

Almost surely, 2^276005681 is an apocalyptic number.

It is an amenable number.

276005681 is a deficient number, since it is larger than the sum of its proper divisors (68128399).

276005681 is a wasteful number, since it uses less digits than its factorization.

276005681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6693 (or 6686 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 276005681 is about 16613.4187029642. The cubic root of 276005681 is about 651.0874742748.

The spelling of 276005681 in words is "two hundred seventy-six million, five thousand, six hundred eighty-one".