66801046903 has 2 divisors, whose sum is σ = 66801046904. Its totient is φ = 66801046902.

The previous prime is 66801046771. The next prime is 66801046913. The reversal of 66801046903 is 30964010866.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66801046903 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66801046903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66801046913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33400523451 + 33400523452.

It is an arithmetic number, because the mean of its divisors is an integer number (33400523452).

Almost surely, 2^66801046903 is an apocalyptic number.

66801046903 is a deficient number, since it is larger than the sum of its proper divisors (1).

66801046903 is an equidigital number, since it uses as much as digits as its factorization.

66801046903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 43.

The spelling of 66801046903 in words is "sixty-six billion, eight hundred one million, forty-six thousand, nine hundred three".