666452135501 has 8 divisors (see below), whose sum is σ = 669764198400. Its totient is φ = 663144436080.

The previous prime is 666452135267. The next prime is 666452135519. The reversal of 666452135501 is 105531254666.

666452135501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 666452135501 - 2¹⁴ = 666452119117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666452135201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 784430 + ... + 1395791.

It is an arithmetic number, because the mean of its divisors is an integer number (83720524800).

Almost surely, 2^666452135501 is an apocalyptic number.

It is an amenable number.

666452135501 is a deficient number, since it is larger than the sum of its proper divisors (3312062899).

666452135501 is a wasteful number, since it uses less digits than its factorization.

666452135501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2181739.

The product of its (nonzero) digits is 648000, while the sum is 44.

The spelling of 666452135501 in words is "six hundred sixty-six billion, four hundred fifty-two million, one hundred thirty-five thousand, five hundred one".