66515083 has 2 divisors, whose sum is σ = 66515084. Its totient is φ = 66515082.

The previous prime is 66515063. The next prime is 66515089. The reversal of 66515083 is 38051566.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66515083 - 2⁵ = 66515051 is a prime.

It is not a weakly prime, because it can be changed into another prime (66515089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33257541 + 33257542.

It is an arithmetic number, because the mean of its divisors is an integer number (33257542).

Almost surely, 2^66515083 is an apocalyptic number.

66515083 is a deficient number, since it is larger than the sum of its proper divisors (1).

66515083 is an equidigital number, since it uses as much as digits as its factorization.

66515083 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 66515083 is about 8155.6779607829. The cubic root of 66515083 is about 405.1725789928.

The spelling of 66515083 in words is "sixty-six million, five hundred fifteen thousand, eighty-three".