66250156140 has 144 divisors (see below), whose sum is σ = 231941586240. Its totient is φ = 14992934400.

The previous prime is 66250156123. The next prime is 66250156223. The reversal of 66250156140 is 4165105266.

66250156140 is a `hidden beast` number, since 6 + 6 + 2 + 50 + 1 + 561 + 40 = 666.

66250156140 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 a junction number, because it is equal to n+sod(n) for n = 66250156095 and 66250156104.

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, 133035 + ... + 387554.

It is an arithmetic number, because the mean of its divisors is an integer number (1610705460).

Almost surely, 2^66250156140 is an apocalyptic number.

66250156140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66250156140 is an abundant number, since it is smaller than the sum of its proper divisors (165691430100).

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

66250156140 is a wasteful number, since it uses less digits than its factorization.

66250156140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520712 (or 520707 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 66250156140 in words is "sixty-six billion, two hundred fifty million, one hundred fifty-six thousand, one hundred forty".