66249018422499 has 64 divisors (see below), whose sum is σ = 97167314050560. Its totient is φ = 39816546432000.

The previous prime is 66249018422437. The next prime is 66249018422501. The reversal of 66249018422499 is 99422481094266.

It is a happy number.

66249018422499 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 8139350²-1.

It is not a de Polignac number, because 66249018422499 - 2³⁶ = 66180298945763 is a prime.

It is a super-2 number, since 2×66249018422499² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66249018422299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6584729929 + ... + 6584739989.

It is an arithmetic number, because the mean of its divisors is an integer number (1518239282040).

Almost surely, 2^{66249018422499} is an apocalyptic number.

66249018422499 is a deficient number, since it is larger than the sum of its proper divisors (30918295628061).

66249018422499 is a wasteful number, since it uses less digits than its factorization.

66249018422499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12612.

The product of its (nonzero) digits is 107495424, while the sum is 66.

The spelling of 66249018422499 in words is "sixty-six trillion, two hundred forty-nine billion, eighteen million, four hundred twenty-two thousand, four hundred ninety-nine".