66652475904 has 480 divisors, whose sum is σ = 227891664000. Its totient is φ = 18358272000.

The previous prime is 66652475843. The next prime is 66652475917. The reversal of 66652475904 is 40957425666.

It is a super-3 number, since 3×66652475904³ (a number of 33 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 133571847 + ... + 133572345.

It is an arithmetic number, because the mean of its divisors is an integer number (474774300).

Almost surely, 2^66652475904 is an apocalyptic number.

66652475904 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 66652475904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113945832000).

66652475904 is an abundant number, since it is smaller than the sum of its proper divisors (161239188096).

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

66652475904 is a wasteful number, since it uses less digits than its factorization.

66652475904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672 (or 653 counting only the distinct ones).

The product of its (nonzero) digits is 10886400, while the sum is 54.

The spelling of 66652475904 in words is "sixty-six billion, six hundred fifty-two million, four hundred seventy-five thousand, nine hundred four".