663417091 has 8 divisors (see below), whose sum is σ = 706749120. Its totient is φ = 620926632.

The previous prime is 663417089. The next prime is 663417103. The reversal of 663417091 is 190714366.

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 663417091 - 2¹ = 663417089 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 663417091.

It is not an unprimeable number, because it can be changed into a prime (663417031) 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, 208765 + ... + 211918.

It is an arithmetic number, because the mean of its divisors is an integer number (88343640).

Almost surely, 2^663417091 is an apocalyptic number.

663417091 is a deficient number, since it is larger than the sum of its proper divisors (43332029).

663417091 is a wasteful number, since it uses less digits than its factorization.

663417091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420785.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 663417091 is about 25756.8843418609. The cubic root of 663417091 is about 872.1587693642.

The spelling of 663417091 in words is "six hundred sixty-three million, four hundred seventeen thousand, ninety-one".