61668200186867 has 2 divisors, whose sum is σ = 61668200186868. Its totient is φ = 61668200186866.

The previous prime is 61668200186731. The next prime is 61668200186869. The reversal of 61668200186867 is 76868100286616.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61668200186867 - 2³² = 61663905219571 is a prime.

Together with 61668200186869, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61668200186869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30834100093433 + 30834100093434.

It is an arithmetic number, because the mean of its divisors is an integer number (30834100093434).

Almost surely, 2^{61668200186867} is an apocalyptic number.

61668200186867 is a deficient number, since it is larger than the sum of its proper divisors (1).

61668200186867 is an equidigital number, since it uses as much as digits as its factorization.

61668200186867 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 55738368, while the sum is 65.

The spelling of 61668200186867 in words is "sixty-one trillion, six hundred sixty-eight billion, two hundred million, one hundred eighty-six thousand, eight hundred sixty-seven".