66614923584 has 392 divisors, whose sum is σ = 217437992352. Its totient is φ = 20072033280.

The previous prime is 66614923579. The next prime is 66614923591. The reversal of 66614923584 is 48532941666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 66614923584.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 150372067 + ... + 150372509.

It is an arithmetic number, because the mean of its divisors is an integer number (554688756).

Almost surely, 2^66614923584 is an apocalyptic number.

66614923584 is a gapful number since it is divisible by the number (64) 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 66614923584, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108718996176).

66614923584 is an abundant number, since it is smaller than the sum of its proper divisors (150823068768).

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

66614923584 is a wasteful number, since it uses less digits than its factorization.

66614923584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777 (or 752 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 54.

The spelling of 66614923584 in words is "sixty-six billion, six hundred fourteen million, nine hundred twenty-three thousand, five hundred eighty-four".