486666781 has 4 divisors (see below), whose sum is σ = 492827200. Its totient is φ = 480506364.

The previous prime is 486666773. The next prime is 486666787. The reversal of 486666781 is 187666684.

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.

It is a cyclic number.

It is not a de Polignac number, because 486666781 - 2³ = 486666773 is a prime.

It is a super-2 number, since 2×486666781² = 473689111457803922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (486666787) 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, 3080091 + ... + 3080248.

It is an arithmetic number, because the mean of its divisors is an integer number (123206800).

Almost surely, 2^486666781 is an apocalyptic number.

It is an amenable number.

486666781 is a deficient number, since it is larger than the sum of its proper divisors (6160419).

486666781 is an equidigital number, since it uses as much as digits as its factorization.

486666781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6160418.

The product of its digits is 2322432, while the sum is 52.

The square root of 486666781 is about 22060.5254017215. The cubic root of 486666781 is about 786.5818137395.

The spelling of 486666781 in words is "four hundred eighty-six million, six hundred sixty-six thousand, seven hundred eighty-one".