1266285660 has 48 divisors (see below), whose sum is σ = 3547152000. Its totient is φ = 337528384.

The previous prime is 1266285659. The next prime is 1266285661. The reversal of 1266285660 is 665826621.

It is an interprime number because it is at equal distance from previous prime (1266285659) and next prime (1266285661).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266285661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 245791 + ... + 250889.

It is an arithmetic number, because the mean of its divisors is an integer number (73899000).

Almost surely, 2^1266285660 is an apocalyptic number.

1266285660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1266285660 is an abundant number, since it is smaller than the sum of its proper divisors (2280866340).

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

1266285660 is a wasteful number, since it uses less digits than its factorization.

1266285660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9250 (or 9248 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 42.

The square root of 1266285660 is about 35584.9077559574. The cubic root of 1266285660 is about 1081.8753596278.

The spelling of 1266285660 in words is "one billion, two hundred sixty-six million, two hundred eighty-five thousand, six hundred sixty".