666452135545 has 16 divisors (see below), whose sum is σ = 928974970368. Its totient is φ = 449504015040.

The previous prime is 666452135519. The next prime is 666452135579. The reversal of 666452135545 is 545531254666.

It is not a de Polignac number, because 666452135545 - 2²¹ = 666450038393 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 666452135492 and 666452135501.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156075649 + ... + 156079918.

It is an arithmetic number, because the mean of its divisors is an integer number (58060935648).

Almost surely, 2^666452135545 is an apocalyptic number.

It is an amenable number.

666452135545 is a deficient number, since it is larger than the sum of its proper divisors (262522834823).

666452135545 is a wasteful number, since it uses less digits than its factorization.

666452135545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312155640.

The product of its digits is 12960000, while the sum is 52.

The spelling of 666452135545 in words is "six hundred sixty-six billion, four hundred fifty-two million, one hundred thirty-five thousand, five hundred forty-five".