66687011 has 2 divisors, whose sum is σ = 66687012. Its totient is φ = 66687010.

The previous prime is 66687007. The next prime is 66687053. The reversal of 66687011 is 11078666.

66687011 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 66687011 - 2² = 66687007 is a prime.

It is a super-2 number, since 2×66687011² = 8894314872228242, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66687811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33343505 + 33343506.

It is an arithmetic number, because the mean of its divisors is an integer number (33343506).

Almost surely, 2^66687011 is an apocalyptic number.

66687011 is a deficient number, since it is larger than the sum of its proper divisors (1).

66687011 is an equidigital number, since it uses as much as digits as its factorization.

66687011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 66687011 is about 8166.2115451414. The cubic root of 66687011 is about 405.5213749582.

The spelling of 66687011 in words is "sixty-six million, six hundred eighty-seven thousand, eleven".