664673710 has 8 divisors (see below), whose sum is σ = 1196412696. Its totient is φ = 265869480.

The previous prime is 664673699. The next prime is 664673717. The reversal of 664673710 is 17376466.

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

It is a super-5 number, since 5×664673710⁵ (a number of 45 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664673717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33233676 + ... + 33233695.

It is an arithmetic number, because the mean of its divisors is an integer number (149551587).

Almost surely, 2^664673710 is an apocalyptic number.

664673710 is a deficient number, since it is larger than the sum of its proper divisors (531738986).

664673710 is a wasteful number, since it uses less digits than its factorization.

664673710 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66467378.

The product of its (nonzero) digits is 127008, while the sum is 40.

The square root of 664673710 is about 25781.2666484795. The cubic root of 664673710 is about 872.7090918489.

The spelling of 664673710 in words is "six hundred sixty-four million, six hundred seventy-three thousand, seven hundred ten".