1266770740 has 12 divisors (see below), whose sum is σ = 2660218596. Its totient is φ = 506708288.

The previous prime is 1266770689. The next prime is 1266770777. The reversal of 1266770740 is 470776621.

It can be written as a sum of positive squares in 2 ways, for example, as 561974436 + 704796304 = 23706^2 + 26548^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1266770693 and 1266770702.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 31669249 + ... + 31669288.

It is an arithmetic number, because the mean of its divisors is an integer number (221684883).

Almost surely, 2^1266770740 is an apocalyptic number.

1266770740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1266770740 is an abundant number, since it is smaller than the sum of its proper divisors (1393447856).

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

1266770740 is a wasteful number, since it uses less digits than its factorization.

1266770740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63338546 (or 63338544 counting only the distinct ones).

The product of its (nonzero) digits is 98784, while the sum is 40.

The square root of 1266770740 is about 35591.7229141833. The cubic root of 1266770740 is about 1082.0134877818.

The spelling of 1266770740 in words is "one billion, two hundred sixty-six million, seven hundred seventy thousand, seven hundred forty".