662678 has 4 divisors (see below), whose sum is σ = 994020. Its totient is φ = 331338.

The previous prime is 662671. The next prime is 662681. The reversal of 662678 is 876266.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 876266 = 2 ⋅438133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (662671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165668 + ... + 165671.

It is an arithmetic number, because the mean of its divisors is an integer number (248505).

2⁶⁶²⁶⁷⁸ is an apocalyptic number.

662678 is a deficient number, since it is larger than the sum of its proper divisors (331342).

662678 is a wasteful number, since it uses less digits than its factorization.

662678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331341.

The product of its digits is 24192, while the sum is 35.

The square root of 662678 is about 814.0503669921. The cubic root of 662678 is about 87.1834767952.

It can be divided in two parts, 66 and 2678, that added together give a cube (2744 = 14³).

The spelling of 662678 in words is "six hundred sixty-two thousand, six hundred seventy-eight".