276215668 has 6 divisors (see below), whose sum is σ = 483377426. Its totient is φ = 138107832.

The previous prime is 276215629. The next prime is 276215689. The reversal of 276215668 is 866512672.

It can be written as a sum of positive squares in only one way, i.e., 181387024 + 94828644 = 13468^2 + 9738^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34526955 + ... + 34526962.

Almost surely, 2^276215668 is an apocalyptic number.

It is an amenable number.

276215668 is a deficient number, since it is larger than the sum of its proper divisors (207161758).

276215668 is a wasteful number, since it uses less digits than its factorization.

276215668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69053921 (or 69053919 counting only the distinct ones).

The product of its digits is 241920, while the sum is 43.

The square root of 276215668 is about 16619.7373023764. The cubic root of 276215668 is about 651.2525496785.

The spelling of 276215668 in words is "two hundred seventy-six million, two hundred fifteen thousand, six hundred sixty-eight".