66455560403 has 2 divisors, whose sum is σ = 66455560404. Its totient is φ = 66455560402.

The previous prime is 66455560337. The next prime is 66455560427. The reversal of 66455560403 is 30406555466.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66455560403 is a prime.

It is not a weakly prime, because it can be changed into another prime (66455560453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33227780201 + 33227780202.

It is an arithmetic number, because the mean of its divisors is an integer number (33227780202).

Almost surely, 2^66455560403 is an apocalyptic number.

66455560403 is a deficient number, since it is larger than the sum of its proper divisors (1).

66455560403 is an equidigital number, since it uses as much as digits as its factorization.

66455560403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296000, while the sum is 44.

The spelling of 66455560403 in words is "sixty-six billion, four hundred fifty-five million, five hundred sixty thousand, four hundred three".