1066355563 has 32 divisors (see below), whose sum is σ = 1385072640. Its totient is φ = 797247360.

The previous prime is 1066355551. The next prime is 1066355657. The reversal of 1066355563 is 3655536601.

It is not a de Polignac number, because 1066355563 - 2⁹ = 1066355051 is a prime.

It is a super-2 number, since 2×1066355563² = 2274228373482093938, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1066355513) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1170078 + ... + 1170988.

It is an arithmetic number, because the mean of its divisors is an integer number (43283520).

Almost surely, 2^1066355563 is an apocalyptic number.

1066355563 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1066355563 is a deficient number, since it is larger than the sum of its proper divisors (318717077).

1066355563 is a wasteful number, since it uses less digits than its factorization.

1066355563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1627.

The product of its (nonzero) digits is 243000, while the sum is 40.

The square root of 1066355563 is about 32655.1001070277. The cubic root of 1066355563 is about 1021.6465661683.

The spelling of 1066355563 in words is "one billion, sixty-six million, three hundred fifty-five thousand, five hundred sixty-three".