1156071256666 has 128 divisors (see below), whose sum is σ = 1919990096640. Its totient is φ = 520224768000.

The previous prime is 1156071256643. The next prime is 1156071256699. The reversal of 1156071256666 is 6666521706511.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4114132446 + ... + 4114132726.

It is an arithmetic number, because the mean of its divisors is an integer number (14999922630).

Almost surely, 2^{1156071256666} is an apocalyptic number.

1156071256666 is a deficient number, since it is larger than the sum of its proper divisors (763918839974).

1156071256666 is a wasteful number, since it uses less digits than its factorization.

1156071256666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800.

The product of its (nonzero) digits is 2721600, while the sum is 52.

The spelling of 1156071256666 in words is "one trillion, one hundred fifty-six billion, seventy-one million, two hundred fifty-six thousand, six hundred sixty-six".