61686886166352 has 30 divisors (see below), whose sum is σ = 172637605035402. Its totient is φ = 20562295388736.

The previous prime is 61686886166329. The next prime is 61686886166429. The reversal of 61686886166352 is 25366168868616.

61686886166352 is a `hidden beast` number, since 6 + 1 + 6 + 86 + 88 + 61 + 66 + 352 = 666.

61686886166352 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 35150005417536 + 26536880748816 = 5928744^2 + 5151396^2 .

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 214190576823 + ... + 214190577110.

Almost surely, 2^{61686886166352} is an apocalyptic number.

It is an amenable number.

61686886166352 is an abundant number, since it is smaller than the sum of its proper divisors (110950718869050).

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

61686886166352 is a wasteful number, since it uses less digits than its factorization.

61686886166352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428381153947 (or 428381153938 counting only the distinct ones).

The product of its digits is 716636160, while the sum is 72.

The spelling of 61686886166352 in words is "sixty-one trillion, six hundred eighty-six billion, eight hundred eighty-six million, one hundred sixty-six thousand, three hundred fifty-two".