1065661155 has 48 divisors (see below), whose sum is σ = 2021912256. Its totient is φ = 516015360.

The previous prime is 1065661147. The next prime is 1065661171. The reversal of 1065661155 is 5511665601.

It is not a de Polignac number, because 1065661155 - 2³ = 1065661147 is a prime.

It is a super-2 number, since 2×1065661155² = 2271267394551868050, which contains 22 as substring.

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 47 ways as a sum of consecutive naturals, for example, 20754 + ... + 50616.

It is an arithmetic number, because the mean of its divisors is an integer number (42123172).

Almost surely, 2^1065661155 is an apocalyptic number.

1065661155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1065661155 is a deficient number, since it is larger than the sum of its proper divisors (956251101).

1065661155 is a wasteful number, since it uses less digits than its factorization.

1065661155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29948 (or 29945 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The square root of 1065661155 is about 32644.4659169054. The cubic root of 1065661155 is about 1021.4247534747.

The spelling of 1065661155 in words is "one billion, sixty-five million, six hundred sixty-one thousand, one hundred fifty-five".