1000660155 has 64 divisors (see below), whose sum is σ = 1783710720. Its totient is φ = 474969600.

The previous prime is 1000660123. The next prime is 1000660189. The reversal of 1000660155 is 5510660001.

It is not a de Polignac number, because 1000660155 - 2⁵ = 1000660123 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2682549 + ... + 2682921.

It is an arithmetic number, because the mean of its divisors is an integer number (27870480).

Almost surely, 2^1000660155 is an apocalyptic number.

1000660155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1000660155 is a deficient number, since it is larger than the sum of its proper divisors (783050565).

1000660155 is a wasteful number, since it uses less digits than its factorization.

1000660155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 1000660155 is about 31633.2128466269. The cubic root of 1000660155 is about 1000.2200032617.

It can be divided in two parts, 10006601 and 55, that multiplied together give a palindrome (550363055).

The spelling of 1000660155 in words is "one billion, six hundred sixty thousand, one hundred fifty-five".