167220066161 has 4 divisors (see below), whose sum is σ = 169715888112. Its totient is φ = 164724244212.

The previous prime is 167220066151. The next prime is 167220066163. The reversal of 167220066161 is 161660022761.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 161660022761 = 364379 ⋅443659.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-167220066161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (167220066163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1247910875 + ... + 1247911008.

It is an arithmetic number, because the mean of its divisors is an integer number (42428972028).

Almost surely, 2^167220066161 is an apocalyptic number.

It is an amenable number.

167220066161 is a deficient number, since it is larger than the sum of its proper divisors (2495821951).

167220066161 is an equidigital number, since it uses as much as digits as its factorization.

167220066161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2495821950.

The product of its (nonzero) digits is 36288, while the sum is 38.

The spelling of 167220066161 in words is "one hundred sixty-seven billion, two hundred twenty million, sixty-six thousand, one hundred sixty-one".