661436346 has 64 divisors (see below), whose sum is σ = 1425828096. Its totient is φ = 204019200.

The previous prime is 661436329. The next prime is 661436353. The reversal of 661436346 is 643634166.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1434556 + ... + 1435016.

It is an arithmetic number, because the mean of its divisors is an integer number (22278564).

Almost surely, 2^661436346 is an apocalyptic number.

661436346 is an abundant number, since it is smaller than the sum of its proper divisors (764391750).

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

661436346 is a wasteful number, since it uses less digits than its factorization.

661436346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807.

The product of its digits is 186624, while the sum is 39.

The square root of 661436346 is about 25718.4048105632. The cubic root of 661436346 is about 871.2899111073.

The spelling of 661436346 in words is "six hundred sixty-one million, four hundred thirty-six thousand, three hundred forty-six".