661385346 has 8 divisors (see below), whose sum is σ = 1322770704. Its totient is φ = 220461780.

The previous prime is 661385327. The next prime is 661385369. The reversal of 661385346 is 643583166.

661385346 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

661385346 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 661385298 and 661385307.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55115440 + ... + 55115451.

It is an arithmetic number, because the mean of its divisors is an integer number (165346338).

Almost surely, 2^661385346 is an apocalyptic number.

661385346 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

661385346 is a wasteful number, since it uses less digits than its factorization.

661385346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110230896.

The product of its digits is 311040, while the sum is 42.

The square root of 661385346 is about 25717.4132836100. The cubic root of 661385346 is about 871.2675169506.

The spelling of 661385346 in words is "six hundred sixty-one million, three hundred eighty-five thousand, three hundred forty-six".