618666043 has 2 divisors, whose sum is σ = 618666044. Its totient is φ = 618666042.

The previous prime is 618666031. The next prime is 618666053. The reversal of 618666043 is 340666816.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-618666043 is a prime.

It is a super-2 number, since 2×618666043² = 765495345522555698, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 618665987 and 618666005.

It is not a weakly prime, because it can be changed into another prime (618666053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309333021 + 309333022.

It is an arithmetic number, because the mean of its divisors is an integer number (309333022).

Almost surely, 2^618666043 is an apocalyptic number.

618666043 is a deficient number, since it is larger than the sum of its proper divisors (1).

618666043 is an equidigital number, since it uses as much as digits as its factorization.

618666043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 618666043 is about 24872.9982712177. The cubic root of 618666043 is about 852.0899174609.

The spelling of 618666043 in words is "six hundred eighteen million, six hundred sixty-six thousand, forty-three".