545466661 has 2 divisors, whose sum is σ = 545466662. Its totient is φ = 545466660.

The previous prime is 545466587. The next prime is 545466667. The reversal of 545466661 is 166664545.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 428697025 + 116769636 = 20705^2 + 10806^2 .

It is a cyclic number.

It is not a de Polignac number, because 545466661 - 2⁹ = 545466149 is a prime.

It is a super-3 number, since 3×545466661³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (545466667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272733330 + 272733331.

It is an arithmetic number, because the mean of its divisors is an integer number (272733331).

Almost surely, 2^545466661 is an apocalyptic number.

It is an amenable number.

545466661 is a deficient number, since it is larger than the sum of its proper divisors (1).

545466661 is an equidigital number, since it uses as much as digits as its factorization.

545466661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 518400, while the sum is 43.

The square root of 545466661 is about 23355.2277017374. The cubic root of 545466661 is about 817.0639900501.

The spelling of 545466661 in words is "five hundred forty-five million, four hundred sixty-six thousand, six hundred sixty-one".