666403663053 has 32 divisors (see below), whose sum is σ = 931878858240. Its totient is φ = 423062377920.

The previous prime is 666403662979. The next prime is 666403663069. The reversal of 666403663053 is 350366304666.

It is not a de Polignac number, because 666403663053 - 2⁸ = 666403662797 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 666403662993 and 666403663011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666403653053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1678350 + ... + 2037072.

It is an arithmetic number, because the mean of its divisors is an integer number (29121214320).

Almost surely, 2^666403663053 is an apocalyptic number.

It is an amenable number.

666403663053 is a deficient number, since it is larger than the sum of its proper divisors (265475195187).

666403663053 is a wasteful number, since it uses less digits than its factorization.

666403663053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359049.

The product of its (nonzero) digits is 4199040, while the sum is 48.

The spelling of 666403663053 in words is "six hundred sixty-six billion, four hundred three million, six hundred sixty-three thousand, fifty-three".