66662611 has 2 divisors, whose sum is σ = 66662612. Its totient is φ = 66662610.

The previous prime is 66662551. The next prime is 66662623. The reversal of 66662611 is 11626666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66662611 - 2⁷ = 66662483 is a prime.

It is not a weakly prime, because it can be changed into another prime (66665611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33331305 + 33331306.

It is an arithmetic number, because the mean of its divisors is an integer number (33331306).

Almost surely, 2^66662611 is an apocalyptic number.

66662611 is a deficient number, since it is larger than the sum of its proper divisors (1).

66662611 is an equidigital number, since it uses as much as digits as its factorization.

66662611 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 34.

The square root of 66662611 is about 8164.7174476524. The cubic root of 66662611 is about 405.4719104102.

The spelling of 66662611 in words is "sixty-six million, six hundred sixty-two thousand, six hundred eleven".