64166671 has 4 divisors (see below), whose sum is σ = 64334592. Its totient is φ = 63998752.

The previous prime is 64166657. The next prime is 64166741. The reversal of 64166671 is 17666146.

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

It is a cyclic number.

It is not a de Polignac number, because 64166671 - 2¹⁵ = 64133903 is a prime.

It is a super-4 number, since 4×64166671⁴ (a number of 32 digits) contains 4444 as substring.

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 64166671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64166611) 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, 83386 + ... + 84151.

It is an arithmetic number, because the mean of its divisors is an integer number (16083648).

Almost surely, 2^64166671 is an apocalyptic number.

64166671 is a deficient number, since it is larger than the sum of its proper divisors (167921).

64166671 is a wasteful number, since it uses less digits than its factorization.

64166671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167920.

The product of its digits is 36288, while the sum is 37.

The square root of 64166671 is about 8010.4101642800. The cubic root of 64166671 is about 400.3469302615.

The spelling of 64166671 in words is "sixty-four million, one hundred sixty-six thousand, six hundred seventy-one".