666535046 has 4 divisors (see below), whose sum is σ = 999802572. Its totient is φ = 333267522.

The previous prime is 666535027. The next prime is 666535081. The reversal of 666535046 is 640535666.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 666534994 and 666535012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166633760 + ... + 166633763.

It is an arithmetic number, because the mean of its divisors is an integer number (249950643).

Almost surely, 2^666535046 is an apocalyptic number.

666535046 is a deficient number, since it is larger than the sum of its proper divisors (333267526).

666535046 is a wasteful number, since it uses less digits than its factorization.

666535046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333267525.

The product of its (nonzero) digits is 388800, while the sum is 41.

The square root of 666535046 is about 25817.3400256494. The cubic root of 666535046 is about 873.5229703308.

The spelling of 666535046 in words is "six hundred sixty-six million, five hundred thirty-five thousand, forty-six".