665655354016619 has 8 divisors (see below), whose sum is σ = 666291672892560. Its totient is φ = 665019273604896.

The previous prime is 665655354016603. The next prime is 665655354016643. The reversal of 665655354016619 is 916610453556566.

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

It is a cyclic number.

It is not a de Polignac number, because 665655354016619 - 2⁴ = 665655354016603 is a prime.

It is a super-2 number, since 2×665655354016619² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665655354013619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54030284 + ... + 65196489.

It is an arithmetic number, because the mean of its divisors is an integer number (83286459111570).

Almost surely, 2^{665655354016619} is an apocalyptic number.

665655354016619 is a deficient number, since it is larger than the sum of its proper divisors (636318875941).

665655354016619 is a wasteful number, since it uses less digits than its factorization.

665655354016619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119232109.

The product of its (nonzero) digits is 524880000, while the sum is 68.

The spelling of 665655354016619 in words is "six hundred sixty-five trillion, six hundred fifty-five billion, three hundred fifty-four million, sixteen thousand, six hundred nineteen".