647661414 has 8 divisors (see below), whose sum is σ = 1295322840. Its totient is φ = 215887136.

The previous prime is 647661407. The next prime is 647661473. The reversal of 647661414 is 414166746.

647661414 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.

647661414 is an admirable number.

It is a Curzon number.

It is a congruent number.

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, 53971779 + ... + 53971790.

It is an arithmetic number, because the mean of its divisors is an integer number (161915355).

Almost surely, 2^647661414 is an apocalyptic number.

647661414 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.

647661414 is a wasteful number, since it uses less digits than its factorization.

647661414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107943574.

The product of its digits is 96768, while the sum is 39.

The square root of 647661414 is about 25449.1927966291. The cubic root of 647661414 is about 865.1989981754.

The spelling of 647661414 in words is "six hundred forty-seven million, six hundred sixty-one thousand, four hundred fourteen".