1056466881 has 20 divisors (see below), whose sum is σ = 1580827732. Its totient is φ = 703129248.

The previous prime is 1056466849. The next prime is 1056466891. The reversal of 1056466881 is 1886646501.

1056466881 is a `hidden beast` number, since 1 + 0 + 564 + 6 + 6 + 8 + 81 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20657025 + 1035809856 = 4545^2 + 32184^2 .

It is not a de Polignac number, because 1056466881 - 2⁵ = 1056466849 is a prime.

It is a super-2 number, since 2×1056466881² = 2232244541299736322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1056466841) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 39015 + ... + 60291.

Almost surely, 2^1056466881 is an apocalyptic number.

It is an amenable number.

1056466881 is a deficient number, since it is larger than the sum of its proper divisors (524360851).

1056466881 is an equidigital number, since it uses as much as digits as its factorization.

1056466881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21902 (or 21893 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The square root of 1056466881 is about 32503.3364595083. The cubic root of 1056466881 is about 1018.4787270441.

The spelling of 1056466881 in words is "one billion, fifty-six million, four hundred sixty-six thousand, eight hundred eighty-one".