220166701687 has 2 divisors, whose sum is σ = 220166701688. Its totient is φ = 220166701686.

The previous prime is 220166701669. The next prime is 220166701691. The reversal of 220166701687 is 786107661022.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220166701687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220166701607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110083350843 + 110083350844.

It is an arithmetic number, because the mean of its divisors is an integer number (110083350844).

Almost surely, 2^220166701687 is an apocalyptic number.

220166701687 is a deficient number, since it is larger than the sum of its proper divisors (1).

220166701687 is an equidigital number, since it uses as much as digits as its factorization.

220166701687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 338688, while the sum is 46.

The spelling of 220166701687 in words is "two hundred twenty billion, one hundred sixty-six million, seven hundred one thousand, six hundred eighty-seven".