126738666 has 24 divisors (see below), whose sum is σ = 275115204. Its totient is φ = 42167040.

The previous prime is 126738659. The next prime is 126738691. The reversal of 126738666 is 666837621.

It can be written as a sum of positive squares in 2 ways, for example, as 82901025 + 43837641 = 9105^2 + 6621^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3706 + ... + 16346.

Almost surely, 2^126738666 is an apocalyptic number.

126738666 is an abundant number, since it is smaller than the sum of its proper divisors (148376538).

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

126738666 is a wasteful number, since it uses less digits than its factorization.

126738666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13206 (or 13203 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 126738666 is about 11257.8268773329. The cubic root of 126738666 is about 502.3075553271.

The spelling of 126738666 in words is "one hundred twenty-six million, seven hundred thirty-eight thousand, six hundred sixty-six".