1276666055 has 16 divisors (see below), whose sum is σ = 1752591360. Its totient is φ = 874560672.

The previous prime is 1276666049. The next prime is 1276666063. The reversal of 1276666055 is 5506666721.

It is a cyclic number.

It is not a de Polignac number, because 1276666055 - 2⁸ = 1276665799 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1276665997 and 1276666015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18812 + ... + 53918.

It is an arithmetic number, because the mean of its divisors is an integer number (109536960).

Almost surely, 2^1276666055 is an apocalyptic number.

1276666055 is a deficient number, since it is larger than the sum of its proper divisors (475925305).

1276666055 is a wasteful number, since it uses less digits than its factorization.

1276666055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36158.

The product of its (nonzero) digits is 453600, while the sum is 44.

The square root of 1276666055 is about 35730.4639628427. The cubic root of 1276666055 is about 1084.8235479369.

The spelling of 1276666055 in words is "one billion, two hundred seventy-six million, six hundred sixty-six thousand, fifty-five".