665653455 has 12 divisors (see below), whose sum is σ = 1153799400. Its totient is φ = 355015152.

The previous prime is 665653453. The next prime is 665653463. The reversal of 665653455 is 554356566.

665653455 is a `hidden beast` number, since 6 + 6 + 565 + 34 + 55 = 666.

It is not a de Polignac number, because 665653455 - 2¹ = 665653453 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 14792299 = 665653455 / (6 + 6 + 5 + 6 + 5 + 3 + 4 + 5 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 665653455.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665653453) 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, 7396105 + ... + 7396194.

It is an arithmetic number, because the mean of its divisors is an integer number (96149950).

Almost surely, 2^665653455 is an apocalyptic number.

665653455 is a deficient number, since it is larger than the sum of its proper divisors (488145945).

665653455 is a wasteful number, since it uses less digits than its factorization.

665653455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14792310 (or 14792307 counting only the distinct ones).

The product of its digits is 1620000, while the sum is 45.

The square root of 665653455 is about 25800.2607544963. The cubic root of 665653455 is about 873.1376793835.

The spelling of 665653455 in words is "six hundred sixty-five million, six hundred fifty-three thousand, four hundred fifty-five".