66050155499991 has 16 divisors (see below), whose sum is σ = 95007345713280. Its totient is φ = 40575065199840.

The previous prime is 66050155499953. The next prime is 66050155500011. The reversal of 66050155499991 is 19999455105066.

It is not a de Polignac number, because 66050155499991 - 2¹⁴ = 66050155483607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66050155499941) 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 15 ways as a sum of consecutive naturals, for example, 1482984501 + ... + 1483029038.

It is an arithmetic number, because the mean of its divisors is an integer number (5937959107080).

Almost surely, 2^{66050155499991} is an apocalyptic number.

66050155499991 is a deficient number, since it is larger than the sum of its proper divisors (28957190213289).

66050155499991 is a wasteful number, since it uses less digits than its factorization.

66050155499991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2966014126.

The product of its (nonzero) digits is 118098000, while the sum is 69.

The spelling of 66050155499991 in words is "sixty-six trillion, fifty billion, one hundred fifty-five million, four hundred ninety-nine thousand, nine hundred ninety-one".