64666851 has 8 divisors (see below), whose sum is σ = 86279760. Its totient is φ = 43082592.

The previous prime is 64666829. The next prime is 64666853. The reversal of 64666851 is 15866646.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64666851 - 2¹⁰ = 64665827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64666853) 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 7 ways as a sum of consecutive naturals, for example, 1180 + ... + 11433.

It is an arithmetic number, because the mean of its divisors is an integer number (10784970).

Almost surely, 2^64666851 is an apocalyptic number.

64666851 is a deficient number, since it is larger than the sum of its proper divisors (21612909).

64666851 is a wasteful number, since it uses less digits than its factorization.

64666851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14325.

The product of its digits is 207360, while the sum is 42.

The square root of 64666851 is about 8041.5701824955. The cubic root of 64666851 is about 401.3844754573.

The spelling of 64666851 in words is "sixty-four million, six hundred sixty-six thousand, eight hundred fifty-one".