665712098 has 8 divisors (see below), whose sum is σ = 1004147280. Its totient is φ = 330996340.

The previous prime is 665712097. The next prime is 665712119. The reversal of 665712098 is 890217566.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (665712097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 929408 + ... + 930123.

It is an arithmetic number, because the mean of its divisors is an integer number (125518410).

Almost surely, 2^665712098 is an apocalyptic number.

665712098 is a deficient number, since it is larger than the sum of its proper divisors (338435182).

665712098 is a wasteful number, since it uses less digits than its factorization.

665712098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1859712.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 665712098 is about 25801.3972102288. The cubic root of 665712098 is about 873.1633193062.

The spelling of 665712098 in words is "six hundred sixty-five million, seven hundred twelve thousand, ninety-eight".