1065665055 has 32 divisors (see below), whose sum is σ = 2098543104. Its totient is φ = 449686656.

The previous prime is 1065665053. The next prime is 1065665113. The reversal of 1065665055 is 5505665601.

It is not a de Polignac number, because 1065665055 - 2¹ = 1065665053 is a prime.

It is a super-2 number, since 2×1065665055² = 2271284018896306050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1065665053) 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, 388989 + ... + 391718.

It is an arithmetic number, because the mean of its divisors is an integer number (65579472).

Almost surely, 2^1065665055 is an apocalyptic number.

1065665055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1065665055 is a deficient number, since it is larger than the sum of its proper divisors (1032878049).

1065665055 is a wasteful number, since it uses less digits than its factorization.

1065665055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780735.

The product of its (nonzero) digits is 135000, while the sum is 39.

The square root of 1065665055 is about 32644.5256513248. The cubic root of 1065665055 is about 1021.4259995092.

The spelling of 1065665055 in words is "one billion, sixty-five million, six hundred sixty-five thousand, fifty-five".