66620274534 has 192 divisors, whose sum is σ = 169493575680. Its totient is φ = 18712512000.

The previous prime is 66620274533. The next prime is 66620274629. The reversal of 66620274534 is 43547202666.

It is a self number, because there is not a number n which added to its sum of digits gives 66620274534.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66620274533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 23316834 + ... + 23319690.

It is an arithmetic number, because the mean of its divisors is an integer number (882779040).

Almost surely, 2^66620274534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66620274534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84746787840).

66620274534 is an abundant number, since it is smaller than the sum of its proper divisors (102873301146).

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

66620274534 is a wasteful number, since it uses less digits than its factorization.

66620274534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3067 (or 3064 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 45.

The spelling of 66620274534 in words is "sixty-six billion, six hundred twenty million, two hundred seventy-four thousand, five hundred thirty-four".