72122601661266 has 16 divisors (see below), whose sum is σ = 155340988193664. Its totient is φ = 22191569741904.

The previous prime is 72122601661259. The next prime is 72122601661267. The reversal of 72122601661266 is 66216610622127.

It is not an unprimeable number, because it can be changed into a prime (72122601661267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 462324369546 + ... + 462324369701.

It is an arithmetic number, because the mean of its divisors is an integer number (9708811762104).

Almost surely, 2^{72122601661266} is an apocalyptic number.

72122601661266 is an abundant number, since it is smaller than the sum of its proper divisors (83218386532398).

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

72122601661266 is a wasteful number, since it uses less digits than its factorization.

72122601661266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924648739265.

The product of its (nonzero) digits is 870912, while the sum is 48.

The spelling of 72122601661266 in words is "seventy-two trillion, one hundred twenty-two billion, six hundred one million, six hundred sixty-one thousand, two hundred sixty-six".