1266764061 has 16 divisors (see below), whose sum is σ = 1801436544. Its totient is φ = 789026304.

The previous prime is 1266764021. The next prime is 1266764063. The reversal of 1266764061 is 1604676621.

It is not a de Polignac number, because 1266764061 - 2⁶ = 1266763997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266764063) by changing a digit.

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, 83665 + ... + 97638.

It is an arithmetic number, because the mean of its divisors is an integer number (112589784).

Almost surely, 2^1266764061 is an apocalyptic number.

It is an amenable number.

1266764061 is a deficient number, since it is larger than the sum of its proper divisors (534672483).

1266764061 is a wasteful number, since it uses less digits than its factorization.

1266764061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181460.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 1266764061 is about 35591.6290860646. The cubic root of 1266764061 is about 1082.0115861536.

The spelling of 1266764061 in words is "one billion, two hundred sixty-six million, seven hundred sixty-four thousand, sixty-one".