477661 has 4 divisors (see below), whose sum is σ = 487872. Its totient is φ = 467452.

The previous prime is 477637. The next prime is 477671. The reversal of 477661 is 166774.

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.

It is a cyclic number.

It is not a de Polignac number, because 477661 - 2⁹ = 477149 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 (477671) 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, 5035 + ... + 5128.

It is an arithmetic number, because the mean of its divisors is an integer number (121968).

2⁴⁷⁷⁶⁶¹ is an apocalyptic number.

It is an amenable number.

477661 is a deficient number, since it is larger than the sum of its proper divisors (10211).

477661 is a wasteful number, since it uses less digits than its factorization.

477661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10210.

The product of its digits is 7056, while the sum is 31.

The square root of 477661 is about 691.1302337476. The cubic root of 477661 is about 78.1699668599.

The spelling of 477661 in words is "four hundred seventy-seven thousand, six hundred sixty-one".