665053047 has 12 divisors (see below), whose sum is σ = 972793120. Its totient is φ = 437755968.

The previous prime is 665053033. The next prime is 665053061. The reversal of 665053047 is 740350566.

It is an interprime number because it is at equal distance from previous prime (665053033) and next prime (665053061).

It is not a de Polignac number, because 665053047 - 2¹⁶ = 664987511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665053247) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 466978 + ... + 468399.

Almost surely, 2^665053047 is an apocalyptic number.

665053047 is a deficient number, since it is larger than the sum of its proper divisors (307740073).

665053047 is a wasteful number, since it uses less digits than its factorization.

665053047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935462 (or 935459 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 36.

The square root of 665053047 is about 25788.6224331584. The cubic root of 665053047 is about 872.8750820109.

The spelling of 665053047 in words is "six hundred sixty-five million, fifty-three thousand, forty-seven".