66051863 has 2 divisors, whose sum is σ = 66051864. Its totient is φ = 66051862.

The previous prime is 66051829. The next prime is 66051877. The reversal of 66051863 is 36815066.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66051863 - 2¹⁴ = 66035479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66051803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33025931 + 33025932.

It is an arithmetic number, because the mean of its divisors is an integer number (33025932).

Almost surely, 2^66051863 is an apocalyptic number.

66051863 is a deficient number, since it is larger than the sum of its proper divisors (1).

66051863 is an equidigital number, since it uses as much as digits as its factorization.

66051863 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 66051863 is about 8127.2297248201. The cubic root of 66051863 is about 404.2298283027.

The spelling of 66051863 in words is "sixty-six million, fifty-one thousand, eight hundred sixty-three".