906606663 has 16 divisors (see below), whose sum is σ = 1262062080. Its totient is φ = 577806944.

The previous prime is 906606661. The next prime is 906606689. The reversal of 906606663 is 366606609.

It is a cyclic number.

It is not a de Polignac number, because 906606663 - 2¹ = 906606661 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (906606661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 241918 + ... + 245636.

It is an arithmetic number, because the mean of its divisors is an integer number (78878880).

Almost surely, 2^906606663 is an apocalyptic number.

906606663 is a deficient number, since it is larger than the sum of its proper divisors (355455417).

906606663 is a wasteful number, since it uses less digits than its factorization.

906606663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7278.

The product of its (nonzero) digits is 209952, while the sum is 42.

The square root of 906606663 is about 30109.9097142452. The cubic root of 906606663 is about 967.8460950902.

The spelling of 906606663 in words is "nine hundred six million, six hundred six thousand, six hundred sixty-three".