661414604 has 6 divisors (see below), whose sum is σ = 1157475564. Its totient is φ = 330707300.

The previous prime is 661414591. The next prime is 661414609. The reversal of 661414604 is 406414166.

661414604 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (661414609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82676822 + ... + 82676829.

It is an arithmetic number, because the mean of its divisors is an integer number (192912594).

Almost surely, 2^661414604 is an apocalyptic number.

It is an amenable number.

661414604 is a deficient number, since it is larger than the sum of its proper divisors (496060960).

661414604 is a wasteful number, since it uses less digits than its factorization.

661414604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165353655 (or 165353653 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 661414604 is about 25717.9821136885. The cubic root of 661414604 is about 871.2803643117.

The spelling of 661414604 in words is "six hundred sixty-one million, four hundred fourteen thousand, six hundred four".