126666740 has 12 divisors (see below), whose sum is σ = 266000196. Its totient is φ = 50666688.

The previous prime is 126666737. The next prime is 126666763. The reversal of 126666740 is 47666621.

It can be written as a sum of positive squares in 2 ways, for example, as 76143076 + 50523664 = 8726^2 + 7108^2 .

It is a junction number, because it is equal to n+sod(n) for n = 126666694 and 126666703.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3166649 + ... + 3166688.

It is an arithmetic number, because the mean of its divisors is an integer number (22166683).

Almost surely, 2^126666740 is an apocalyptic number.

126666740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

126666740 is an abundant number, since it is smaller than the sum of its proper divisors (139333456).

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

126666740 is a wasteful number, since it uses less digits than its factorization.

126666740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6333346 (or 6333344 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 126666740 is about 11254.6319353411. The cubic root of 126666740 is about 502.2125151127.

The spelling of 126666740 in words is "one hundred twenty-six million, six hundred sixty-six thousand, seven hundred forty".