64665166201 has 4 divisors (see below), whose sum is σ = 64775328912. Its totient is φ = 64555003492.

The previous prime is 64665166177. The next prime is 64665166217. The reversal of 64665166201 is 10266156646.

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.

It is a cyclic number.

It is not a de Polignac number, because 64665166201 - 2¹⁷ = 64665035129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64665166301) 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 3 ways as a sum of consecutive naturals, for example, 55080475 + ... + 55081648.

It is an arithmetic number, because the mean of its divisors is an integer number (16193832228).

Almost surely, 2^64665166201 is an apocalyptic number.

It is an amenable number.

64665166201 is a deficient number, since it is larger than the sum of its proper divisors (110162711).

64665166201 is a wasteful number, since it uses less digits than its factorization.

64665166201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110162710.

The product of its (nonzero) digits is 311040, while the sum is 43.

The spelling of 64665166201 in words is "sixty-four billion, six hundred sixty-five million, one hundred sixty-six thousand, two hundred one".