66121057350 has 120 divisors (see below), whose sum is σ = 193388206440. Its totient is φ = 16704247680.

The previous prime is 66121057283. The next prime is 66121057399. The reversal of 66121057350 is 5375012166.

66121057350 is a `hidden beast` number, since 6 + 61 + 21 + 0 + 573 + 5 + 0 = 666.

66121057350 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 352687 + ... + 506586.

It is an arithmetic number, because the mean of its divisors is an integer number (1611568387).

Almost surely, 2^66121057350 is an apocalyptic number.

66121057350 is an abundant number, since it is smaller than the sum of its proper divisors (127267149090).

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

66121057350 is a wasteful number, since it uses less digits than its factorization.

66121057350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859316 (or 859302 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The spelling of 66121057350 in words is "sixty-six billion, one hundred twenty-one million, fifty-seven thousand, three hundred fifty".