64375777 has 2 divisors, whose sum is σ = 64375778. Its totient is φ = 64375776.

The previous prime is 64375769. The next prime is 64375783. The reversal of 64375777 is 77757346.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41422096 + 22953681 = 6436^2 + 4791^2 .

It is a cyclic number.

It is not a de Polignac number, because 64375777 - 2³ = 64375769 is a prime.

It is not a weakly prime, because it can be changed into another prime (64375177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32187888 + 32187889.

It is an arithmetic number, because the mean of its divisors is an integer number (32187889).

Almost surely, 2^64375777 is an apocalyptic number.

It is an amenable number.

64375777 is a deficient number, since it is larger than the sum of its proper divisors (1).

64375777 is an equidigital number, since it uses as much as digits as its factorization.

64375777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864360, while the sum is 46.

The square root of 64375777 is about 8023.4516886437. The cubic root of 64375777 is about 400.7813415198.

The spelling of 64375777 in words is "sixty-four million, three hundred seventy-five thousand, seven hundred seventy-seven".