1266772026 has 32 divisors (see below), whose sum is σ = 2822520960. Its totient is φ = 376334784.

The previous prime is 1266772019. The next prime is 1266772043. The reversal of 1266772026 is 6202776621.

It is a happy number.

It is a super-2 number, since 2×1266772026² = 3209422731712289352, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 277750 + ... + 282273.

It is an arithmetic number, because the mean of its divisors is an integer number (88203780).

Almost surely, 2^1266772026 is an apocalyptic number.

1266772026 is an abundant number, since it is smaller than the sum of its proper divisors (1555748934).

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

1266772026 is a wasteful number, since it uses less digits than its factorization.

1266772026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560070.

The product of its (nonzero) digits is 84672, while the sum is 39.

The square root of 1266772026 is about 35591.7409801768. The cubic root of 1266772026 is about 1082.0138539277.

The spelling of 1266772026 in words is "one billion, two hundred sixty-six million, seven hundred seventy-two thousand, twenty-six".