1266669534 has 48 divisors (see below), whose sum is σ = 2755786752. Its totient is φ = 387957024.

The previous prime is 1266669527. The next prime is 1266669559. The reversal of 1266669534 is 4359666621.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 227427 + ... + 232929.

It is an arithmetic number, because the mean of its divisors is an integer number (57412224).

Almost surely, 2^1266669534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1266669534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1377893376).

1266669534 is an abundant number, since it is smaller than the sum of its proper divisors (1489117218).

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

1266669534 is a wasteful number, since it uses less digits than its factorization.

1266669534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5761 (or 5748 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 48.

The square root of 1266669534 is about 35590.3011226373. The cubic root of 1266669534 is about 1081.9846719458.

The spelling of 1266669534 in words is "one billion, two hundred sixty-six million, six hundred sixty-nine thousand, five hundred thirty-four".