66722853960 has 192 divisors, whose sum is σ = 247924385280. Its totient is φ = 15244992000.

The previous prime is 66722853871. The next prime is 66722853979. The reversal of 66722853960 is 6935822766.

It is a super-3 number, since 3×66722853960³ (a number of 33 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 66722853897 and 66722853906.

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, 11969734 + ... + 11975306.

It is an arithmetic number, because the mean of its divisors is an integer number (1291272840).

Almost surely, 2^66722853960 is an apocalyptic number.

66722853960 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 66722853960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123962192640).

66722853960 is an abundant number, since it is smaller than the sum of its proper divisors (181201531320).

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

66722853960 is a wasteful number, since it uses less digits than its factorization.

66722853960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10348 (or 10341 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 54.

The spelling of 66722853960 in words is "sixty-six billion, seven hundred twenty-two million, eight hundred fifty-three thousand, nine hundred sixty".