66513703 has 2 divisors, whose sum is σ = 66513704. Its totient is φ = 66513702.

The previous prime is 66513641. The next prime is 66513719. The reversal of 66513703 is 30731566.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66513703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66513743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33256851 + 33256852.

It is an arithmetic number, because the mean of its divisors is an integer number (33256852).

Almost surely, 2^66513703 is an apocalyptic number.

66513703 is a deficient number, since it is larger than the sum of its proper divisors (1).

66513703 is an equidigital number, since it uses as much as digits as its factorization.

66513703 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 31.

The square root of 66513703 is about 8155.5933567092. The cubic root of 66513703 is about 405.1697769115.

The spelling of 66513703 in words is "sixty-six million, five hundred thirteen thousand, seven hundred three".