66672569520 has 240 divisors, whose sum is σ = 225620059392. Its totient is φ = 17644055040.

The previous prime is 66672569473. The next prime is 66672569527. The reversal of 66672569520 is 2596527666.

It is a tau number, because it is divible by the number of its divisors (240).

It is not an unprimeable number, because it can be changed into a prime (66672569527) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 82209915 + ... + 82210725.

Almost surely, 2^66672569520 is an apocalyptic number.

66672569520 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 66672569520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112810029696).

66672569520 is an abundant number, since it is smaller than the sum of its proper divisors (158947489872).

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

66672569520 is a wasteful number, since it uses less digits than its factorization.

66672569520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1560 (or 1551 counting only the distinct ones).

The product of its (nonzero) digits is 8164800, while the sum is 54.

The spelling of 66672569520 in words is "sixty-six billion, six hundred seventy-two million, five hundred sixty-nine thousand, five hundred twenty".