66150178429 has 2 divisors, whose sum is σ = 66150178430. Its totient is φ = 66150178428.

The previous prime is 66150178397. The next prime is 66150178447. The reversal of 66150178429 is 92487105166.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57257311225 + 8892867204 = 239285^2 + 94302^2 .

It is a cyclic number.

It is not a de Polignac number, because 66150178429 - 2⁵ = 66150178397 is a prime.

It is a super-2 number, since 2×66150178429² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66150178729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33075089214 + 33075089215.

It is an arithmetic number, because the mean of its divisors is an integer number (33075089215).

Almost surely, 2^66150178429 is an apocalyptic number.

It is an amenable number.

66150178429 is a deficient number, since it is larger than the sum of its proper divisors (1).

66150178429 is an equidigital number, since it uses as much as digits as its factorization.

66150178429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 66150178429 in words is "sixty-six billion, one hundred fifty million, one hundred seventy-eight thousand, four hundred twenty-nine".