665170518424 has 16 divisors (see below), whose sum is σ = 1247206853520. Its totient is φ = 332582024160.

The previous prime is 665170518371. The next prime is 665170518461. The reversal of 665170518424 is 424815071566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 623022 + ... + 1310914.

It is an arithmetic number, because the mean of its divisors is an integer number (77950428345).

Almost surely, 2^665170518424 is an apocalyptic number.

It is an amenable number.

665170518424 is a deficient number, since it is larger than the sum of its proper divisors (582036335096).

665170518424 is a wasteful number, since it uses less digits than its factorization.

665170518424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808770 (or 808766 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 49.

The spelling of 665170518424 in words is "six hundred sixty-five billion, one hundred seventy million, five hundred eighteen thousand, four hundred twenty-four".