64647061 has 8 divisors (see below), whose sum is σ = 66984120. Its totient is φ = 62317248.

The previous prime is 64647049. The next prime is 64647097. The reversal of 64647061 is 16074646.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 16080100 + 48566961 = 4010^2 + 6969^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64647061 - 2²³ = 56258453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64647001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21715 + ... + 24511.

It is an arithmetic number, because the mean of its divisors is an integer number (8373015).

Almost surely, 2^64647061 is an apocalyptic number.

It is an amenable number.

64647061 is a deficient number, since it is larger than the sum of its proper divisors (2337059).

64647061 is a wasteful number, since it uses less digits than its factorization.

64647061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3623.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 64647061 is about 8040.3396072554. The cubic root of 64647061 is about 401.3435260420.

The spelling of 64647061 in words is "sixty-four million, six hundred forty-seven thousand, sixty-one".