665546046 has 16 divisors (see below), whose sum is σ = 1452100608. Its totient is φ = 201680600.

The previous prime is 665546033. The next prime is 665546053. The reversal of 665546046 is 640645566.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 665545989 and 665546007.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5041950 + ... + 5042081.

It is an arithmetic number, because the mean of its divisors is an integer number (90756288).

Almost surely, 2^665546046 is an apocalyptic number.

665546046 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

665546046 is an abundant number, since it is smaller than the sum of its proper divisors (786554562).

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

665546046 is a wasteful number, since it uses less digits than its factorization.

665546046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10084047.

The product of its (nonzero) digits is 518400, while the sum is 42.

The square root of 665546046 is about 25798.1791217907. The cubic root of 665546046 is about 873.0907140600.

The spelling of 665546046 in words is "six hundred sixty-five million, five hundred forty-six thousand, forty-six".