666662 has 4 divisors (see below), whose sum is σ = 999996. Its totient is φ = 333330.

The previous prime is 666649. The next prime is 666667. The reversal of 666662 is 266666.

It is a semiprime because it is the product of two primes.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166664 + ... + 166667.

It is an arithmetic number, because the mean of its divisors is an integer number (249999).

2⁶⁶⁶⁶⁶² is an apocalyptic number.

666662 is a deficient number, since it is larger than the sum of its proper divisors (333334).

666662 is a wasteful number, since it uses less digits than its factorization.

666662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333333.

The product of its digits is 15552, while the sum is 32.

The square root of 666662 is about 816.4937231847. The cubic root of 666662 is about 87.3578426377.

The spelling of 666662 in words is "six hundred sixty-six thousand, six hundred sixty-two".