65990477 has 16 divisors (see below), whose sum is σ = 79680000. Its totient is φ = 53388720.

The previous prime is 65990437. The next prime is 65990479. The reversal of 65990477 is 77409956.

It is not a de Polignac number, because 65990477 - 2¹⁰ = 65989453 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65990479) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 43274 + ... + 44772.

It is an arithmetic number, because the mean of its divisors is an integer number (4980000).

Almost surely, 2^65990477 is an apocalyptic number.

It is an amenable number.

65990477 is a deficient number, since it is larger than the sum of its proper divisors (13689523).

65990477 is a wasteful number, since it uses less digits than its factorization.

65990477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1856.

The product of its (nonzero) digits is 476280, while the sum is 47.

The square root of 65990477 is about 8123.4522833584. The cubic root of 65990477 is about 404.1045643956.

The spelling of 65990477 in words is "sixty-five million, nine hundred ninety thousand, four hundred seventy-seven".