1056661478 has 32 divisors (see below), whose sum is σ = 1690946400. Its totient is φ = 493807104.

The previous prime is 1056661453. The next prime is 1056661493. The reversal of 1056661478 is 8741666501.

It is a super-2 number, since 2×1056661478² = 2233066958178288968, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1395476 + ... + 1396232.

It is an arithmetic number, because the mean of its divisors is an integer number (52842075).

Almost surely, 2^1056661478 is an apocalyptic number.

1056661478 is a deficient number, since it is larger than the sum of its proper divisors (634284922).

1056661478 is a wasteful number, since it uses less digits than its factorization.

1056661478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1224.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 1056661478 is about 32506.3298143608. The cubic root of 1056661478 is about 1018.5412564494.

The spelling of 1056661478 in words is "one billion, fifty-six million, six hundred sixty-one thousand, four hundred seventy-eight".