678466 has 12 divisors (see below), whose sum is σ = 1054566. Its totient is φ = 327360.

The previous prime is 678463. The next prime is 678479. The reversal of 678466 is 664876.

678466 is nontrivially palindromic in base 5.

It can be written as a sum of positive squares in only one way, i.e., 600625 + 77841 = 775^2 + 279^2 .

It is a super-2 number, since 2×678466² = 920632226312, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (678463) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1746 + ... + 2098.

2⁶⁷⁸⁴⁶⁶ is an apocalyptic number.

678466 is a deficient number, since it is larger than the sum of its proper divisors (376100).

678466 is a wasteful number, since it uses less digits than its factorization.

678466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417 (or 386 counting only the distinct ones).

The product of its digits is 48384, while the sum is 37.

The square root of 678466 is about 823.6904758464. The cubic root of 678466 is about 87.8704187877.

It can be divided in two parts, 6784 and 66, that multiplied together give a palindrome (447744).

The spelling of 678466 in words is "six hundred seventy-eight thousand, four hundred sixty-six".