64668061 has 2 divisors, whose sum is σ = 64668062. Its totient is φ = 64668060.

The previous prime is 64668059. The next prime is 64668073. The reversal of 64668061 is 16086646.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33419961 + 31248100 = 5781^2 + 5590^2 .

It is a cyclic number.

It is not a de Polignac number, because 64668061 - 2¹ = 64668059 is a prime.

It is a super-3 number, since 3×64668061³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 64668059, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64668061.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64668011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32334030 + 32334031.

It is an arithmetic number, because the mean of its divisors is an integer number (32334031).

Almost surely, 2^64668061 is an apocalyptic number.

It is an amenable number.

64668061 is a deficient number, since it is larger than the sum of its proper divisors (1).

64668061 is an equidigital number, since it uses as much as digits as its factorization.

64668061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 64668061 is about 8041.6454162068. The cubic root of 64668061 is about 401.3869789151.

The spelling of 64668061 in words is "sixty-four million, six hundred sixty-eight thousand, sixty-one".