2066555511 has 20 divisors (see below), whose sum is σ = 3186663744. Its totient is φ = 1333260000.

The previous prime is 2066555483. The next prime is 2066555567. The reversal of 2066555511 is 1155556602.

It is not a de Polignac number, because 2066555511 - 2¹⁴ = 2066539127 is a prime.

It is a super-2 number, since 2×2066555511² = 8541303360088942242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2066555111) 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, 408990 + ... + 414011.

Almost surely, 2^2066555511 is an apocalyptic number.

2066555511 is a deficient number, since it is larger than the sum of its proper divisors (1120108233).

2066555511 is an equidigital number, since it uses as much as digits as its factorization.

2066555511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823044 (or 823035 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 36.

The square root of 2066555511 is about 45459.3830908428. The cubic root of 2066555511 is about 1273.7446079186.

It can be divided in two parts, 20665 and 55511, that added together give a square (76176 = 276²).

The spelling of 2066555511 in words is "two billion, sixty-six million, five hundred fifty-five thousand, five hundred eleven".