66936899 has 2 divisors, whose sum is σ = 66936900. Its totient is φ = 66936898.

The previous prime is 66936833. The next prime is 66936911. The reversal of 66936899 is 99863966.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66936899 - 2⁸ = 66936643 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66936809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33468449 + 33468450.

It is an arithmetic number, because the mean of its divisors is an integer number (33468450).

Almost surely, 2^66936899 is an apocalyptic number.

66936899 is a deficient number, since it is larger than the sum of its proper divisors (1).

66936899 is an equidigital number, since it uses as much as digits as its factorization.

66936899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3779136, while the sum is 56.

The square root of 66936899 is about 8181.4973568412. The cubic root of 66936899 is about 406.0272636532.

The spelling of 66936899 in words is "sixty-six million, nine hundred thirty-six thousand, eight hundred ninety-nine".