667825965865 has 8 divisors (see below), whose sum is σ = 848531815560. Its totient is φ = 502833668352.

The previous prime is 667825965839. The next prime is 667825965871. The reversal of 667825965865 is 568569528766.

It can be written as a sum of positive squares in 4 ways, for example, as 75337074576 + 592488891289 = 274476^2 + 769733^2 .

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 667825965865 - 2⁹ = 667825965353 is a prime.

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, 3928387950 + ... + 3928388119.

It is an arithmetic number, because the mean of its divisors is an integer number (106066476945).

Almost surely, 2^667825965865 is an apocalyptic number.

It is an amenable number.

667825965865 is a deficient number, since it is larger than the sum of its proper divisors (180705849695).

667825965865 is a wasteful number, since it uses less digits than its factorization.

667825965865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7856776091.

The product of its digits is 1306368000, while the sum is 73.

The spelling of 667825965865 in words is "six hundred sixty-seven billion, eight hundred twenty-five million, nine hundred sixty-five thousand, eight hundred sixty-five".