126551334666666 has 128 divisors (see below), whose sum is σ = 315435020414976. Its totient is φ = 32956179010560.

The previous prime is 126551334666661. The next prime is 126551334666683. The reversal of 126551334666666 is 666666433155621.

It is a junction number, because it is equal to n+sod(n) for n = 126551334666597 and 126551334666606.

It is not an unprimeable number, because it can be changed into a prime (126551334666661) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 82946386 + ... + 84458306.

It is an arithmetic number, because the mean of its divisors is an integer number (2464336096992).

Almost surely, 2^{126551334666666} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 126551334666666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157717510207488).

126551334666666 is an abundant number, since it is smaller than the sum of its proper divisors (188883685748310).

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

126551334666666 is a wasteful number, since it uses less digits than its factorization.

126551334666666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1513876.

The product of its digits is 503884800, while the sum is 66.

The spelling of 126551334666666 in words is "one hundred twenty-six trillion, five hundred fifty-one billion, three hundred thirty-four million, six hundred sixty-six thousand, six hundred sixty-six".