276666121 has 4 divisors (see below), whose sum is σ = 277874500. Its totient is φ = 275457744.

The previous prime is 276666107. The next prime is 276666133. The reversal of 276666121 is 121666672.

It is a happy number.

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 113720896 + 162945225 = 10664^2 + 12765^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-276666121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (276666101) 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, 603846 + ... + 604303.

It is an arithmetic number, because the mean of its divisors is an integer number (69468625).

Almost surely, 2^276666121 is an apocalyptic number.

It is an amenable number.

276666121 is a deficient number, since it is larger than the sum of its proper divisors (1208379).

276666121 is a wasteful number, since it uses less digits than its factorization.

276666121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1208378.

The product of its digits is 36288, while the sum is 37.

The square root of 276666121 is about 16633.2835303196. The cubic root of 276666121 is about 651.6063786766.

The spelling of 276666121 in words is "two hundred seventy-six million, six hundred sixty-six thousand, one hundred twenty-one".