66851107560 has 192 divisors, whose sum is σ = 224821396800. Its totient is φ = 17216381952.

The previous prime is 66851107559. The next prime is 66851107591. The reversal of 66851107560 is 6570115866.

66851107560 is a `hidden beast` number, since 6 + 6 + 8 + 511 + 0 + 75 + 60 = 666.

66851107560 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 1353459 + ... + 1401981.

It is an arithmetic number, because the mean of its divisors is an integer number (1170944775).

Almost surely, 2^66851107560 is an apocalyptic number.

66851107560 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 66851107560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112410698400).

66851107560 is an abundant number, since it is smaller than the sum of its proper divisors (157970289240).

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

66851107560 is a wasteful number, since it uses less digits than its factorization.

66851107560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48672 (or 48665 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The spelling of 66851107560 in words is "sixty-six billion, eight hundred fifty-one million, one hundred seven thousand, five hundred sixty".