66740733331 has 2 divisors, whose sum is σ = 66740733332. Its totient is φ = 66740733330.

The previous prime is 66740733329. The next prime is 66740733377. The reversal of 66740733331 is 13333704766.

66740733331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66740733331 - 2¹ = 66740733329 is a prime.

It is a super-2 number, since 2×66740733331² (a number of 22 digits) contains 22 as substring.

Together with 66740733329, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (66740734331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33370366665 + 33370366666.

It is an arithmetic number, because the mean of its divisors is an integer number (33370366666).

Almost surely, 2^66740733331 is an apocalyptic number.

66740733331 is a deficient number, since it is larger than the sum of its proper divisors (1).

66740733331 is an equidigital number, since it uses as much as digits as its factorization.

66740733331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 571536, while the sum is 43.

The spelling of 66740733331 in words is "sixty-six billion, seven hundred forty million, seven hundred thirty-three thousand, three hundred thirty-one".