64666910033 has 6 divisors (see below), whose sum is σ = 71080157442. Its totient is φ = 58788099920.

The previous prime is 64666910023. The next prime is 64666910051. The reversal of 64666910033 is 33001966646.

It can be written as a sum of positive squares in only one way, i.e., 61082133904 + 3584776129 = 247148^2 + 59873^2 .

It is not a de Polignac number, because 64666910033 - 2¹² = 64666905937 is a prime.

It is a super-2 number, since 2×64666910033² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64666910003) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 267218516 + ... + 267218757.

It is an arithmetic number, because the mean of its divisors is an integer number (11846692907).

Almost surely, 2^64666910033 is an apocalyptic number.

It is an amenable number.

64666910033 is a deficient number, since it is larger than the sum of its proper divisors (6413247409).

64666910033 is a wasteful number, since it uses less digits than its factorization.

64666910033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534437295 (or 534437284 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 44.

The spelling of 64666910033 in words is "sixty-four billion, six hundred sixty-six million, nine hundred ten thousand, thirty-three".