664474342740 has 96 divisors (see below), whose sum is σ = 2057798386560. Its totient is φ = 159142288896.

The previous prime is 664474342729. The next prime is 664474342757. The reversal of 664474342740 is 47243474466.

It is a happy number.

664474342740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11483170 + ... + 11540889.

It is an arithmetic number, because the mean of its divisors is an integer number (21435399860).

Almost surely, 2^664474342740 is an apocalyptic number.

664474342740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

664474342740 is an abundant number, since it is smaller than the sum of its proper divisors (1393324043820).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664474342740 is a wasteful number, since it uses less digits than its factorization.

664474342740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23024121 (or 23024119 counting only the distinct ones).

The product of its (nonzero) digits is 10838016, while the sum is 51.

The spelling of 664474342740 in words is "six hundred sixty-four billion, four hundred seventy-four million, three hundred forty-two thousand, seven hundred forty".