665056046 has 4 divisors (see below), whose sum is σ = 997584072. Its totient is φ = 332528022.

The previous prime is 665056027. The next prime is 665056087. The reversal of 665056046 is 640650566.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 640650566 = 2 ⋅320325283.

It is a Curzon number.

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, 166264010 + ... + 166264013.

It is an arithmetic number, because the mean of its divisors is an integer number (249396018).

Almost surely, 2^665056046 is an apocalyptic number.

665056046 is a deficient number, since it is larger than the sum of its proper divisors (332528026).

665056046 is a wasteful number, since it uses less digits than its factorization.

665056046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332528025.

The product of its (nonzero) digits is 129600, while the sum is 38.

The square root of 665056046 is about 25788.6805788896. The cubic root of 665056046 is about 872.8763940609.

The spelling of 665056046 in words is "six hundred sixty-five million, fifty-six thousand, forty-six".