1678256466 has 8 divisors (see below), whose sum is σ = 3356512944. Its totient is φ = 559418820.

The previous prime is 1678256423. The next prime is 1678256467. The reversal of 1678256466 is 6646528761.

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

1678256466 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1678256467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139854700 + ... + 139854711.

It is an arithmetic number, because the mean of its divisors is an integer number (419564118).

Almost surely, 2^1678256466 is an apocalyptic number.

1678256466 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.

1678256466 is a wasteful number, since it uses less digits than its factorization.

1678256466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279709416.

The product of its digits is 2903040, while the sum is 51.

The square root of 1678256466 is about 40966.5286056800. The cubic root of 1678256466 is about 1188.3730009810.

The spelling of 1678256466 in words is "one billion, six hundred seventy-eight million, two hundred fifty-six thousand, four hundred sixty-six".