1065664615 has 4 divisors (see below), whose sum is σ = 1278797544. Its totient is φ = 852531688.

The previous prime is 1065664541. The next prime is 1065664619. The reversal of 1065664615 is 5164665601.

1065664615 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5164665601 = 42299 ⋅122099.

It is a cyclic number.

It is not a de Polignac number, because 1065664615 - 2⁷ = 1065664487 is a prime.

It is a super-2 number, since 2×1065664615² = 2271282143326196450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1065664619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106566457 + ... + 106566466.

It is an arithmetic number, because the mean of its divisors is an integer number (319699386).

Almost surely, 2^1065664615 is an apocalyptic number.

1065664615 is a deficient number, since it is larger than the sum of its proper divisors (213132929).

1065664615 is an equidigital number, since it uses as much as digits as its factorization.

1065664615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213132928.

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 1065664615 is about 32644.5189120624. The cubic root of 1065664615 is about 1021.4258589311.

The spelling of 1065664615 in words is "one billion, sixty-five million, six hundred sixty-four thousand, six hundred fifteen".