1266348660 has 24 divisors (see below), whose sum is σ = 3545776416. Its totient is φ = 337692960.

The previous prime is 1266348647. The next prime is 1266348661. The reversal of 1266348660 is 668436621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266348661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10552846 + ... + 10552965.

It is an arithmetic number, because the mean of its divisors is an integer number (147740684).

Almost surely, 2^1266348660 is an apocalyptic number.

1266348660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1266348660 is an abundant number, since it is smaller than the sum of its proper divisors (2279427756).

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

1266348660 is a wasteful number, since it uses less digits than its factorization.

1266348660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21105823 (or 21105821 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 42.

The square root of 1266348660 is about 35585.7929516823. The cubic root of 1266348660 is about 1081.8933010817.

The spelling of 1266348660 in words is "one billion, two hundred sixty-six million, three hundred forty-eight thousand, six hundred sixty".