666535045 has 16 divisors (see below), whose sum is σ = 892850112. Its totient is φ = 473477760.

The previous prime is 666535027. The next prime is 666535081. The reversal of 666535045 is 540535666.

It is a happy number.

It is not a de Polignac number, because 666535045 - 2²⁵ = 632980613 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 666534989 and 666535007.

It is a congruent number.

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, 138552 + ... + 143281.

It is an arithmetic number, because the mean of its divisors is an integer number (55803132).

Almost surely, 2^666535045 is an apocalyptic number.

It is an amenable number.

666535045 is a deficient number, since it is larger than the sum of its proper divisors (226315067).

666535045 is a wasteful number, since it uses less digits than its factorization.

666535045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281892.

The product of its (nonzero) digits is 324000, while the sum is 40.

The square root of 666535045 is about 25817.3400062826. The cubic root of 666535045 is about 873.5229698940.

The spelling of 666535045 in words is "six hundred sixty-six million, five hundred thirty-five thousand, forty-five".