66045143251 has 2 divisors, whose sum is σ = 66045143252. Its totient is φ = 66045143250.

The previous prime is 66045143233. The next prime is 66045143267. The reversal of 66045143251 is 15234154066.

66045143251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66045143251 - 2¹¹ = 66045141203 is a prime.

It is a super-2 number, since 2×66045143251² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66045143251.

It is not a weakly prime, because it can be changed into another prime (66045143651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33022571625 + 33022571626.

It is an arithmetic number, because the mean of its divisors is an integer number (33022571626).

Almost surely, 2^66045143251 is an apocalyptic number.

66045143251 is a deficient number, since it is larger than the sum of its proper divisors (1).

66045143251 is an equidigital number, since it uses as much as digits as its factorization.

66045143251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 66045143251 in words is "sixty-six billion, forty-five million, one hundred forty-three thousand, two hundred fifty-one".