66110922240 has 320 divisors, whose sum is σ = 232024649472. Its totient is φ = 15925248000.

The previous prime is 66110922221. The next prime is 66110922257. The reversal of 66110922240 is 4222901166.

It is a tau number, because it is divible by the number of its divisors (320).

It is a Harshad number since it is a multiple of its sum of digits (33).

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, 13767840 + ... + 13772640.

Almost surely, 2^66110922240 is an apocalyptic number.

66110922240 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 66110922240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116012324736).

66110922240 is an abundant number, since it is smaller than the sum of its proper divisors (165913727232).

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

66110922240 is a wasteful number, since it uses less digits than its factorization.

66110922240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5001 (or 4985 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

It can be divided in two parts, 661 and 10922240, that added together give a palindrome (10922901).

The spelling of 66110922240 in words is "sixty-six billion, one hundred ten million, nine hundred twenty-two thousand, two hundred forty".