1056559666 has 8 divisors (see below), whose sum is σ = 1593137664. Its totient is φ = 525513780.

The previous prime is 1056559633. The next prime is 1056559723. The reversal of 1056559666 is 6669556501.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1056559666² = 2232636655636063112, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1382550 + ... + 1383313.

It is an arithmetic number, because the mean of its divisors is an integer number (199142208).

Almost surely, 2^1056559666 is an apocalyptic number.

1056559666 is a deficient number, since it is larger than the sum of its proper divisors (536577998).

1056559666 is a wasteful number, since it uses less digits than its factorization.

1056559666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2766056.

The product of its (nonzero) digits is 1458000, while the sum is 49.

The square root of 1056559666 is about 32504.7637431808. The cubic root of 1056559666 is about 1018.5085423919.

The spelling of 1056559666 in words is "one billion, fifty-six million, five hundred fifty-nine thousand, six hundred sixty-six".