1296773766 has 16 divisors (see below), whose sum is σ = 2881719600. Its totient is φ = 432257904.

The previous prime is 1296773761. The next prime is 1296773783. The reversal of 1296773766 is 6673776921.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 24014329 = 1296773766 / (1 + 2 + 9 + 6 + 7 + 7 + 3 + 7 + 6 + 6).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1296773761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12007111 + ... + 12007218.

It is an arithmetic number, because the mean of its divisors is an integer number (180107475).

Almost surely, 2^1296773766 is an apocalyptic number.

1296773766 is an abundant number, since it is smaller than the sum of its proper divisors (1584945834).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1296773766 is a wasteful number, since it uses less digits than its factorization.

1296773766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24014340 (or 24014334 counting only the distinct ones).

The product of its digits is 4000752, while the sum is 54.

The square root of 1296773766 is about 36010.7451464143. The cubic root of 1296773766 is about 1090.4892918732.

The spelling of 1296773766 in words is "one billion, two hundred ninety-six million, seven hundred seventy-three thousand, seven hundred sixty-six".