664637740143 has 8 divisors (see below), whose sum is σ = 954351626928. Its totient is φ = 409007840064.

The previous prime is 664637740139. The next prime is 664637740181. The reversal of 664637740143 is 341047736466.

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

It is not a de Polignac number, because 664637740143 - 2² = 664637740139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664637740343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8520996630 + ... + 8520996707.

It is an arithmetic number, because the mean of its divisors is an integer number (119293953366).

Almost surely, 2^664637740143 is an apocalyptic number.

664637740143 is a deficient number, since it is larger than the sum of its proper divisors (289713886785).

664637740143 is a wasteful number, since it uses less digits than its factorization.

664637740143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17041993353.

The product of its (nonzero) digits is 6096384, while the sum is 51.

The spelling of 664637740143 in words is "six hundred sixty-four billion, six hundred thirty-seven million, seven hundred forty thousand, one hundred forty-three".