661235338 has 16 divisors (see below), whose sum is σ = 1022684256. Its totient is φ = 320458320.

The previous prime is 661235297. The next prime is 661235357. The reversal of 661235338 is 833532166.

It is a happy number.

661235338 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 661235297 and 661235306.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18081 + ... + 40612.

It is an arithmetic number, because the mean of its divisors is an integer number (63917766).

Almost surely, 2^661235338 is an apocalyptic number.

661235338 is a deficient number, since it is larger than the sum of its proper divisors (361448918).

661235338 is a wasteful number, since it uses less digits than its factorization.

661235338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58869.

The product of its digits is 77760, while the sum is 37.

The square root of 661235338 is about 25714.4966507221. The cubic root of 661235338 is about 871.2016415973.

The spelling of 661235338 in words is "six hundred sixty-one million, two hundred thirty-five thousand, three hundred thirty-eight".