64665201 has 4 divisors (see below), whose sum is σ = 86220272. Its totient is φ = 43110132.

The previous prime is 64665199. The next prime is 64665203. The reversal of 64665201 is 10256646.

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 an interprime number because it is at equal distance from previous prime (64665199) and next prime (64665203).

It is not a de Polignac number, because 64665201 - 2¹ = 64665199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64665203) 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, 10777531 + ... + 10777536.

It is an arithmetic number, because the mean of its divisors is an integer number (21555068).

Almost surely, 2^64665201 is an apocalyptic number.

It is an amenable number.

64665201 is a deficient number, since it is larger than the sum of its proper divisors (21555071).

64665201 is a wasteful number, since it uses less digits than its factorization.

64665201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21555070.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 64665201 is about 8041.4675899366. The cubic root of 64665201 is about 401.3810616010.

The spelling of 64665201 in words is "sixty-four million, six hundred sixty-five thousand, two hundred one".