64566811 has 2 divisors, whose sum is σ = 64566812. Its totient is φ = 64566810.

The previous prime is 64566797. The next prime is 64566823. The reversal of 64566811 is 11866546.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64566811 - 2¹³ = 64558619 is a prime.

It is not a weakly prime, because it can be changed into another prime (64566851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32283405 + 32283406.

It is an arithmetic number, because the mean of its divisors is an integer number (32283406).

Almost surely, 2^64566811 is an apocalyptic number.

64566811 is a deficient number, since it is larger than the sum of its proper divisors (1).

64566811 is an equidigital number, since it uses as much as digits as its factorization.

64566811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 37.

The square root of 64566811 is about 8035.3475967129. The cubic root of 64566811 is about 401.1773872479.

The spelling of 64566811 in words is "sixty-four million, five hundred sixty-six thousand, eight hundred eleven".