665464141 has 2 divisors, whose sum is σ = 665464142. Its totient is φ = 665464140.

The previous prime is 665464123. The next prime is 665464157. The reversal of 665464141 is 141464566.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 664092900 + 1371241 = 25770^2 + 1171^2 .

It is a cyclic number.

It is not a de Polignac number, because 665464141 - 2⁵ = 665464109 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 665464141.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665464841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332732070 + 332732071.

It is an arithmetic number, because the mean of its divisors is an integer number (332732071).

Almost surely, 2^665464141 is an apocalyptic number.

It is an amenable number.

665464141 is a deficient number, since it is larger than the sum of its proper divisors (1).

665464141 is an equidigital number, since it uses as much as digits as its factorization.

665464141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 37.

The square root of 665464141 is about 25796.5916547128. The cubic root of 665464141 is about 873.0548971399.

The spelling of 665464141 in words is "six hundred sixty-five million, four hundred sixty-four thousand, one hundred forty-one".