64664101 has 4 divisors (see below), whose sum is σ = 64705900. Its totient is φ = 64622304.

The previous prime is 64664099. The next prime is 64664147. The reversal of 64664101 is 10146646.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31371201 + 33292900 = 5601^2 + 5770^2 .

It is a cyclic number.

It is not a de Polignac number, because 64664101 - 2¹ = 64664099 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64664101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64664191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18486 + ... + 21703.

It is an arithmetic number, because the mean of its divisors is an integer number (16176475).

Almost surely, 2^64664101 is an apocalyptic number.

It is an amenable number.

64664101 is a deficient number, since it is larger than the sum of its proper divisors (41799).

64664101 is a wasteful number, since it uses less digits than its factorization.

64664101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41798.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 64664101 is about 8041.3991941701. The cubic root of 64664101 is about 401.3787856645.

The spelling of 64664101 in words is "sixty-four million, six hundred sixty-four thousand, one hundred one".