1073644665 has 16 divisors (see below), whose sum is σ = 1731360768. Its totient is φ = 568100736.

The previous prime is 1073644633. The next prime is 1073644679. The reversal of 1073644665 is 5664463701.

It is not a de Polignac number, because 1073644665 - 2⁵ = 1073644633 is a prime.

It is a super-3 number, since 3×1073644665³ (a number of 28 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 279892 + ... + 283701.

It is an arithmetic number, because the mean of its divisors is an integer number (108210048).

Almost surely, 2^1073644665 is an apocalyptic number.

1073644665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1073644665 is a deficient number, since it is larger than the sum of its proper divisors (657716103).

1073644665 is a wasteful number, since it uses less digits than its factorization.

1073644665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563728.

The product of its (nonzero) digits is 362880, while the sum is 42.

The square root of 1073644665 is about 32766.5174377748. The cubic root of 1073644665 is about 1023.9691130541.

The spelling of 1073644665 in words is "one billion, seventy-three million, six hundred forty-four thousand, six hundred sixty-five".