66146012460 has 216 divisors, whose sum is σ = 224161309008. Its totient is φ = 15772204800.

The previous prime is 66146012431. The next prime is 66146012503. The reversal of 66146012460 is 6421064166.

66146012460 is a `hidden beast` number, since 6 + 6 + 1 + 4 + 601 + 2 + 46 + 0 = 666.

66146012460 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 (36).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1303687 + ... + 1353473.

It is an arithmetic number, because the mean of its divisors is an integer number (1037783838).

Almost surely, 2^66146012460 is an apocalyptic number.

66146012460 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 66146012460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112080654504).

66146012460 is an abundant number, since it is smaller than the sum of its proper divisors (158015296548).

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

66146012460 is a wasteful number, since it uses less digits than its factorization.

66146012460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49885 (or 49869 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The spelling of 66146012460 in words is "sixty-six billion, one hundred forty-six million, twelve thousand, four hundred sixty".