65668723000 has 64 divisors (see below), whose sum is σ = 153771901920. Its totient is φ = 26249184000.

The previous prime is 65668722983. The next prime is 65668723049. The reversal of 65668723000 is 32786656.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1460860 + ... + 1505140.

Almost surely, 2^65668723000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65668723000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76885950960).

65668723000 is an abundant number, since it is smaller than the sum of its proper divisors (88103178920).

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

65668723000 is a wasteful number, since it uses less digits than its factorization.

65668723000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45785 (or 45771 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 43.

The spelling of 65668723000 in words is "sixty-five billion, six hundred sixty-eight million, seven hundred twenty-three thousand".