666701 has 16 divisors (see below), whose sum is σ = 822528. Its totient is φ = 528000.

The previous prime is 666697. The next prime is 666707. The reversal of 666701 is 107666.

It is a cyclic number.

It is not a de Polignac number, because 666701 - 2² = 666697 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666707) 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, 6551 + ... + 6651.

It is an arithmetic number, because the mean of its divisors is an integer number (51408).

2⁶⁶⁶⁷⁰¹ is an apocalyptic number.

It is an amenable number.

666701 is a deficient number, since it is larger than the sum of its proper divisors (155827).

666701 is a wasteful number, since it uses less digits than its factorization.

666701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 666701 is about 816.5176054440. The cubic root of 666701 is about 87.3595460944.

The spelling of 666701 in words is "six hundred sixty-six thousand, seven hundred one".