661115146 has 48 divisors (see below), whose sum is σ = 1096205760. Its totient is φ = 298166400.

The previous prime is 661115129. The next prime is 661115167. The reversal of 661115146 is 641511166.

661115146 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4378171 + ... + 4378321.

It is an arithmetic number, because the mean of its divisors is an integer number (22837620).

Almost surely, 2^661115146 is an apocalyptic number.

661115146 is a deficient number, since it is larger than the sum of its proper divisors (435090614).

661115146 is a wasteful number, since it uses less digits than its factorization.

661115146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367 (or 338 counting only the distinct ones).

The product of its digits is 4320, while the sum is 31.

The square root of 661115146 is about 25712.1594970162. The cubic root of 661115146 is about 871.1488526194.

The spelling of 661115146 in words is "six hundred sixty-one million, one hundred fifteen thousand, one hundred forty-six".