66754023424 has 117 divisors (see below), whose sum is σ = 147131500971. Its totient is φ = 30260060160.

The previous prime is 66754023419. The next prime is 66754023443. The reversal of 66754023424 is 42432045766.

The square root of 66754023424 is 258368.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 181890889 + ... + 181891255.

Almost surely, 2^66754023424 is an apocalyptic number.

66754023424 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

66754023424 is the 258368-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66754023424

66754023424 is an abundant number, since it is smaller than the sum of its proper divisors (80377477547).

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

66754023424 is an frugal number, since it uses more digits than its factorization.

66754023424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780 (or 380 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 43.

The spelling of 66754023424 in words is "sixty-six billion, seven hundred fifty-four million, twenty-three thousand, four hundred twenty-four".