665016766077065 has 8 divisors (see below), whose sum is σ = 798020650160448. Its totient is φ = 532013058949680.

The previous prime is 665016766077031. The next prime is 665016766077119. The reversal of 665016766077065 is 560770667610566.

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

It is not a de Polignac number, because 665016766077065 - 2¹⁶ = 665016766011529 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 665016766076986 and 665016766077004.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35825741 + ... + 51122570.

It is an arithmetic number, because the mean of its divisors is an integer number (99752581270056).

Almost surely, 2^{665016766077065} is an apocalyptic number.

It is an amenable number.

665016766077065 is a deficient number, since it is larger than the sum of its proper divisors (133003884083383).

665016766077065 is a wasteful number, since it uses less digits than its factorization.

665016766077065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88477999.

The product of its (nonzero) digits is 400075200, while the sum is 68.

The spelling of 665016766077065 in words is "six hundred sixty-five trillion, sixteen billion, seven hundred sixty-six million, seventy-seven thousand, sixty-five".