66149750911 has 2 divisors, whose sum is σ = 66149750912. Its totient is φ = 66149750910.

The previous prime is 66149750851. The next prime is 66149750969. The reversal of 66149750911 is 11905794166.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66149750911 - 2¹⁵ = 66149718143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66149751911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33074875455 + 33074875456.

It is an arithmetic number, because the mean of its divisors is an integer number (33074875456).

Almost surely, 2^66149750911 is an apocalyptic number.

66149750911 is a deficient number, since it is larger than the sum of its proper divisors (1).

66149750911 is an equidigital number, since it uses as much as digits as its factorization.

66149750911 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 408240, while the sum is 49.

The spelling of 66149750911 in words is "sixty-six billion, one hundred forty-nine million, seven hundred fifty thousand, nine hundred eleven".