640131066062 has 8 divisors (see below), whose sum is σ = 960553956096. Its totient is φ = 319946414032.

The previous prime is 640131066059. The next prime is 640131066067. The reversal of 640131066062 is 260660131046.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640131066067) 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, 59552783 + ... + 59563530.

It is an arithmetic number, because the mean of its divisors is an integer number (120069244512).

Almost surely, 2^640131066062 is an apocalyptic number.

640131066062 is a deficient number, since it is larger than the sum of its proper divisors (320422890034).

640131066062 is a wasteful number, since it uses less digits than its factorization.

640131066062 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119119002.

The product of its (nonzero) digits is 31104, while the sum is 35.

The spelling of 640131066062 in words is "six hundred forty billion, one hundred thirty-one million, sixty-six thousand, sixty-two".