511111100066 has 48 divisors (see below), whose sum is σ = 964149748800. Its totient is φ = 198496181664.

The previous prime is 511111100057. The next prime is 511111100099. The reversal of 511111100066 is 660001111115.

It is a happy number.

It is a super-2 number, since 2×511111100066² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1675421 + ... + 1956848.

It is an arithmetic number, because the mean of its divisors is an integer number (20086453100).

Almost surely, 2^511111100066 is an apocalyptic number.

511111100066 is a deficient number, since it is larger than the sum of its proper divisors (453038648734).

511111100066 is a wasteful number, since it uses less digits than its factorization.

511111100066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3632343 (or 3632320 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 23.

The spelling of 511111100066 in words is "five hundred eleven billion, one hundred eleven million, one hundred thousand, sixty-six".