64820801 has 4 divisors (see below), whose sum is σ = 64837332. Its totient is φ = 64804272.

The previous prime is 64820773. The next prime is 64820803. The reversal of 64820801 is 10802846.

64820801 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20611600 + 44209201 = 4540^2 + 6649^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64820801 is a prime.

It is a super-3 number, since 3×64820801³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64820803) 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 in 3 ways as a sum of consecutive naturals, for example, 1331 + ... + 11463.

It is an arithmetic number, because the mean of its divisors is an integer number (16209333).

Almost surely, 2^64820801 is an apocalyptic number.

It is an amenable number.

64820801 is a deficient number, since it is larger than the sum of its proper divisors (16531).

64820801 is a wasteful number, since it uses less digits than its factorization.

64820801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16530.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 64820801 is about 8051.1366278309. The cubic root of 64820801 is about 401.7027434601.

The spelling of 64820801 in words is "sixty-four million, eight hundred twenty thousand, eight hundred one".