66323547400 has 96 divisors (see below), whose sum is σ = 168391097280. Its totient is φ = 24093216000.

The previous prime is 66323547391. The next prime is 66323547419. The reversal of 66323547400 is 474532366.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2231437 + ... + 2260963.

It is an arithmetic number, because the mean of its divisors is an integer number (1754073930).

Almost surely, 2^66323547400 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 66323547400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84195548640).

66323547400 is an abundant number, since it is smaller than the sum of its proper divisors (102067549880).

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

66323547400 is a wasteful number, since it uses less digits than its factorization.

66323547400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30575 (or 30566 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 40.

The spelling of 66323547400 in words is "sixty-six billion, three hundred twenty-three million, five hundred forty-seven thousand, four hundred".