66703860403 has 2 divisors, whose sum is σ = 66703860404. Its totient is φ = 66703860402.

The previous prime is 66703860373. The next prime is 66703860407. The reversal of 66703860403 is 30406830766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66703860403 - 2⁹ = 66703859891 is a prime.

It is a super-2 number, since 2×66703860403² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66703860403.

It is not a weakly prime, because it can be changed into another prime (66703860407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33351930201 + 33351930202.

It is an arithmetic number, because the mean of its divisors is an integer number (33351930202).

Almost surely, 2^66703860403 is an apocalyptic number.

66703860403 is a deficient number, since it is larger than the sum of its proper divisors (1).

66703860403 is an equidigital number, since it uses as much as digits as its factorization.

66703860403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 43.

The spelling of 66703860403 in words is "sixty-six billion, seven hundred three million, eight hundred sixty thousand, four hundred three".