665531446 has 16 divisors (see below), whose sum is σ = 1022058000. Its totient is φ = 324921568.

The previous prime is 665531431. The next prime is 665531459. The reversal of 665531446 is 644135566.

It is a super-2 number, since 2×665531446² = 885864211229701832, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 665531399 and 665531408.

It is a congruent number.

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, 1345 + ... + 36508.

It is an arithmetic number, because the mean of its divisors is an integer number (63878625).

Almost surely, 2^665531446 is an apocalyptic number.

665531446 is a deficient number, since it is larger than the sum of its proper divisors (356526554).

665531446 is a wasteful number, since it uses less digits than its factorization.

665531446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38063.

The product of its digits is 259200, while the sum is 40.

The square root of 665531446 is about 25797.8961545317. The cubic root of 665531446 is about 873.0843297195.

The spelling of 665531446 in words is "six hundred sixty-five million, five hundred thirty-one thousand, four hundred forty-six".