477585661 has 4 divisors (see below), whose sum is σ = 545812192. Its totient is φ = 409359132.

The previous prime is 477585643. The next prime is 477585673. The reversal of 477585661 is 166585774.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 166585774 = 2 ⋅83292887.

It is not a de Polignac number, because 477585661 - 2⁷ = 477585533 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 (477585631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34113255 + ... + 34113268.

It is an arithmetic number, because the mean of its divisors is an integer number (136453048).

Almost surely, 2^477585661 is an apocalyptic number.

It is an amenable number.

477585661 is a deficient number, since it is larger than the sum of its proper divisors (68226531).

477585661 is an equidigital number, since it uses as much as digits as its factorization.

477585661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68226530.

The product of its digits is 1411200, while the sum is 49.

The square root of 477585661 is about 21853.7333423834. The cubic root of 477585661 is about 781.6585686220.

The spelling of 477585661 in words is "four hundred seventy-seven million, five hundred eighty-five thousand, six hundred sixty-one".