665168074998 has 32 divisors (see below), whose sum is σ = 1552732775424. Its totient is φ = 186004445952.

The previous prime is 665168074981. The next prime is 665168075003. The reversal of 665168074998 is 899470861566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168480315 + ... + 168484262.

It is an arithmetic number, because the mean of its divisors is an integer number (48522899232).

Almost surely, 2^665168074998 is an apocalyptic number.

665168074998 is an abundant number, since it is smaller than the sum of its proper divisors (887564700426).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

665168074998 is a wasteful number, since it uses less digits than its factorization.

665168074998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336964636.

The product of its (nonzero) digits is 156764160, while the sum is 69.

The spelling of 665168074998 in words is "six hundred sixty-five billion, one hundred sixty-eight million, seventy-four thousand, nine hundred ninety-eight".