1266661724 has 6 divisors (see below), whose sum is σ = 2216658024. Its totient is φ = 633330860.

The previous prime is 1266661709. The next prime is 1266661757. The reversal of 1266661724 is 4271666621.

It is a happy number.

It is a super-3 number, since 3×1266661724³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158332712 + ... + 158332719.

It is an arithmetic number, because the mean of its divisors is an integer number (369443004).

Almost surely, 2^1266661724 is an apocalyptic number.

It is an amenable number.

1266661724 is a deficient number, since it is larger than the sum of its proper divisors (949996300).

1266661724 is a wasteful number, since it uses less digits than its factorization.

1266661724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316665435 (or 316665433 counting only the distinct ones).

The product of its digits is 145152, while the sum is 41.

The square root of 1266661724 is about 35590.1914015646. The cubic root of 1266661724 is about 1081.9824481831.

The spelling of 1266661724 in words is "one billion, two hundred sixty-six million, six hundred sixty-one thousand, seven hundred twenty-four".