678332261 has 16 divisors (see below), whose sum is σ = 726703488. Its totient is φ = 631752000.

The previous prime is 678332257. The next prime is 678332311. The reversal of 678332261 is 162233876.

678332261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 678332261 - 2² = 678332257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678332231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139310 + ... + 144096.

It is an arithmetic number, because the mean of its divisors is an integer number (45418968).

Almost surely, 2^678332261 is an apocalyptic number.

678332261 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

678332261 is a deficient number, since it is larger than the sum of its proper divisors (48371227).

678332261 is a wasteful number, since it uses less digits than its factorization.

678332261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4972.

The product of its digits is 72576, while the sum is 38.

The square root of 678332261 is about 26044.8125545184. The cubic root of 678332261 is about 878.6464474535.

The spelling of 678332261 in words is "six hundred seventy-eight million, three hundred thirty-two thousand, two hundred sixty-one".