666553346140402 has 16 divisors (see below), whose sum is σ = 1192343873841792. Its totient is φ = 273245471088480.

The previous prime is 666553346140397. The next prime is 666553346140447. The reversal of 666553346140402 is 204041643355666.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1035020723499 + ... + 1035020724142.

It is an arithmetic number, because the mean of its divisors is an integer number (74521492115112).

Almost surely, 2^{666553346140402} is an apocalyptic number.

666553346140402 is a deficient number, since it is larger than the sum of its proper divisors (525790527701390).

666553346140402 is a wasteful number, since it uses less digits than its factorization.

666553346140402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2070041447673.

The product of its (nonzero) digits is 37324800, while the sum is 55.

The spelling of 666553346140402 in words is "six hundred sixty-six trillion, five hundred fifty-three billion, three hundred forty-six million, one hundred forty thousand, four hundred two".