667462431161 has 2 divisors, whose sum is σ = 667462431162. Its totient is φ = 667462431160.

The previous prime is 667462431157. The next prime is 667462431173. The reversal of 667462431161 is 161134264766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 615371215936 + 52091215225 = 784456^2 + 228235^2 .

It is a cyclic number.

It is not a de Polignac number, because 667462431161 - 2² = 667462431157 is a prime.

It is a super-2 number, since 2×667462431161² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (667462431101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333731215580 + 333731215581.

It is an arithmetic number, because the mean of its divisors is an integer number (333731215581).

Almost surely, 2^667462431161 is an apocalyptic number.

It is an amenable number.

667462431161 is a deficient number, since it is larger than the sum of its proper divisors (1).

667462431161 is an equidigital number, since it uses as much as digits as its factorization.

667462431161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 47.

The spelling of 667462431161 in words is "six hundred sixty-seven billion, four hundred sixty-two million, four hundred thirty-one thousand, one hundred sixty-one".