66864189151 has 2 divisors, whose sum is σ = 66864189152. Its totient is φ = 66864189150.

The previous prime is 66864189127. The next prime is 66864189239. The reversal of 66864189151 is 15198146866.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66864189151 is a prime.

It is a super-2 number, since 2×66864189151² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66864189092 and 66864189101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66864189101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33432094575 + 33432094576.

It is an arithmetic number, because the mean of its divisors is an integer number (33432094576).

Almost surely, 2^66864189151 is an apocalyptic number.

66864189151 is a deficient number, since it is larger than the sum of its proper divisors (1).

66864189151 is an equidigital number, since it uses as much as digits as its factorization.

66864189151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2488320, while the sum is 55.

The spelling of 66864189151 in words is "sixty-six billion, eight hundred sixty-four million, one hundred eighty-nine thousand, one hundred fifty-one".