636670 has 8 divisors (see below), whose sum is σ = 1146024. Its totient is φ = 254664.

The previous prime is 636653. The next prime is 636673. The reversal of 636670 is 76636.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636673) by changing a digit.

636670 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31824 + ... + 31843.

It is an arithmetic number, because the mean of its divisors is an integer number (143253).

2⁶³⁶⁶⁷⁰ is an apocalyptic number.

636670 is a deficient number, since it is larger than the sum of its proper divisors (509354).

636670 is a wasteful number, since it uses less digits than its factorization.

636670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63674.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 636670 is about 797.9160356830. The cubic root of 636670 is about 86.0276637163.

The spelling of 636670 in words is "six hundred thirty-six thousand, six hundred seventy".