665169414254 has 4 divisors (see below), whose sum is σ = 997754121384. Its totient is φ = 332584707126.

The previous prime is 665169414211. The next prime is 665169414313. The reversal of 665169414254 is 452414961566.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 665169414196 and 665169414205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166292353562 + ... + 166292353565.

It is an arithmetic number, because the mean of its divisors is an integer number (249438530346).

Almost surely, 2^665169414254 is an apocalyptic number.

665169414254 is a deficient number, since it is larger than the sum of its proper divisors (332584707130).

665169414254 is a wasteful number, since it uses less digits than its factorization.

665169414254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332584707129.

The product of its digits is 6220800, while the sum is 53.

The spelling of 665169414254 in words is "six hundred sixty-five billion, one hundred sixty-nine million, four hundred fourteen thousand, two hundred fifty-four".