664166343 has 8 divisors (see below), whose sum is σ = 885852400. Its totient is φ = 442628928.

The previous prime is 664166341. The next prime is 664166389. The reversal of 664166343 is 343661466.

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

It is not a de Polignac number, because 664166343 - 2¹ = 664166341 is a prime.

It is a super-2 number, since 2×664166343² = 882233862347987298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664166341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26278 + ... + 44931.

It is an arithmetic number, because the mean of its divisors is an integer number (110731550).

Almost surely, 2^664166343 is an apocalyptic number.

664166343 is a deficient number, since it is larger than the sum of its proper divisors (221686057).

664166343 is a wasteful number, since it uses less digits than its factorization.

664166343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74321.

The product of its digits is 186624, while the sum is 39.

The square root of 664166343 is about 25771.4249315012. The cubic root of 664166343 is about 872.4869796061.

The spelling of 664166343 in words is "six hundred sixty-four million, one hundred sixty-six thousand, three hundred forty-three".