666623435 has 16 divisors (see below), whose sum is σ = 829980000. Its totient is φ = 513386496.

The previous prime is 666623423. The next prime is 666623443. The reversal of 666623435 is 534326666.

It is a cyclic number.

It is not a de Polignac number, because 666623435 - 2¹² = 666619339 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 666623392 and 666623401.

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, 43691 + ... + 56939.

It is an arithmetic number, because the mean of its divisors is an integer number (51873750).

Almost surely, 2^666623435 is an apocalyptic number.

666623435 is a deficient number, since it is larger than the sum of its proper divisors (163356565).

666623435 is a wasteful number, since it uses less digits than its factorization.

666623435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13630.

The product of its digits is 466560, while the sum is 41.

The square root of 666623435 is about 25819.0517835183. The cubic root of 666623435 is about 873.5615811584.

The spelling of 666623435 in words is "six hundred sixty-six million, six hundred twenty-three thousand, four hundred thirty-five".