663746061 has 16 divisors (see below), whose sum is σ = 965905920. Its totient is φ = 402079920.

The previous prime is 663746051. The next prime is 663746077. The reversal of 663746061 is 160647366.

It is a happy number.

It is not a de Polignac number, because 663746061 - 2¹⁰ = 663745037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663746051) 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, 101200 + ... + 107558.

It is an arithmetic number, because the mean of its divisors is an integer number (60369120).

Almost surely, 2^663746061 is an apocalyptic number.

It is an amenable number.

663746061 is a deficient number, since it is larger than the sum of its proper divisors (302159859).

663746061 is a wasteful number, since it uses less digits than its factorization.

663746061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9536.

The product of its (nonzero) digits is 108864, while the sum is 39.

The square root of 663746061 is about 25763.2696100476. The cubic root of 663746061 is about 872.3029052645.

The spelling of 663746061 in words is "six hundred sixty-three million, seven hundred forty-six thousand, sixty-one".