666455403379 has 2 divisors, whose sum is σ = 666455403380. Its totient is φ = 666455403378.

The previous prime is 666455403311. The next prime is 666455403557. The reversal of 666455403379 is 973304554666.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 666455403379 - 2¹⁵ = 666455370611 is a prime.

It is not a weakly prime, because it can be changed into another prime (666455403979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333227701689 + 333227701690.

It is an arithmetic number, because the mean of its divisors is an integer number (333227701690).

Almost surely, 2^666455403379 is an apocalyptic number.

666455403379 is a deficient number, since it is larger than the sum of its proper divisors (1).

666455403379 is an equidigital number, since it uses as much as digits as its factorization.

666455403379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48988800, while the sum is 58.

The spelling of 666455403379 in words is "six hundred sixty-six billion, four hundred fifty-five million, four hundred three thousand, three hundred seventy-nine".