618666053 has 2 divisors, whose sum is σ = 618666054. Its totient is φ = 618666052.

The previous prime is 618666043. The next prime is 618666067. The reversal of 618666053 is 350666816.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 587674564 + 30991489 = 24242^2 + 5567^2 .

It is a cyclic number.

It is not a de Polignac number, because 618666053 - 2¹² = 618661957 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 618666053.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (618666043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309333026 + 309333027.

It is an arithmetic number, because the mean of its divisors is an integer number (309333027).

Almost surely, 2^618666053 is an apocalyptic number.

It is an amenable number.

618666053 is a deficient number, since it is larger than the sum of its proper divisors (1).

618666053 is an equidigital number, since it uses as much as digits as its factorization.

618666053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 618666053 is about 24872.9984722389. The cubic root of 618666053 is about 852.0899220519.

The spelling of 618666053 in words is "six hundred eighteen million, six hundred sixty-six thousand, fifty-three".