665554477 has 12 divisors (see below), whose sum is σ = 801025120. Its totient is φ = 540208656.

The previous prime is 665554433. The next prime is 665554489. The reversal of 665554477 is 774455566.

It is not a de Polignac number, because 665554477 - 2¹⁵ = 665521709 is a prime.

Its product of digits (3528000) is a multiple of the sum of its prime factors (4500).

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 665554477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665551477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 296403 + ... + 298639.

Almost surely, 2^665554477 is an apocalyptic number.

It is an amenable number.

665554477 is a deficient number, since it is larger than the sum of its proper divisors (135470643).

665554477 is an frugal number, since it uses more digits than its factorization.

665554477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4500 (or 2263 counting only the distinct ones).

The product of its digits is 3528000, while the sum is 49.

The square root of 665554477 is about 25798.3425242786. The cubic root of 665554477 is about 873.0944007554.

The spelling of 665554477 in words is "six hundred sixty-five million, five hundred fifty-four thousand, four hundred seventy-seven".