64966213601 has 4 divisors (see below), whose sum is σ = 64976494512. Its totient is φ = 64955932692.

The previous prime is 64966213573. The next prime is 64966213679. The reversal of 64966213601 is 10631266946.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10631266946 = 2 ⋅5315633473.

It is a cyclic number.

It is not a de Polignac number, because 64966213601 - 2²⁶ = 64899104737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64966212601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5130971 + ... + 5143616.

It is an arithmetic number, because the mean of its divisors is an integer number (16244123628).

Almost surely, 2^64966213601 is an apocalyptic number.

It is an amenable number.

64966213601 is a deficient number, since it is larger than the sum of its proper divisors (10280911).

64966213601 is a wasteful number, since it uses less digits than its factorization.

64966213601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10280910.

The product of its (nonzero) digits is 279936, while the sum is 44.

The spelling of 64966213601 in words is "sixty-four billion, nine hundred sixty-six million, two hundred thirteen thousand, six hundred one".