664127353140 has 96 divisors (see below), whose sum is σ = 1882444112640. Its totient is φ = 174929719296.

The previous prime is 664127353117. The next prime is 664127353157. The reversal of 664127353140 is 41353721466.

It is a junction number, because it is equal to n+sod(n) for n = 664127353092 and 664127353101.

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, 2265892 + ... + 2542148.

It is an arithmetic number, because the mean of its divisors is an integer number (19608792840).

Almost surely, 2^664127353140 is an apocalyptic number.

664127353140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 664127353140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (941222056320).

664127353140 is an abundant number, since it is smaller than the sum of its proper divisors (1218316759500).

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

664127353140 is a wasteful number, since it uses less digits than its factorization.

664127353140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276761 (or 276759 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 42.

The spelling of 664127353140 in words is "six hundred sixty-four billion, one hundred twenty-seven million, three hundred fifty-three thousand, one hundred forty".