512001665 has 16 divisors (see below), whose sum is σ = 743478912. Its totient is φ = 330434304.

The previous prime is 512001653. The next prime is 512001701. The reversal of 512001665 is 566100215.

It is not a de Polignac number, because 512001665 - 2¹⁶ = 511936129 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 429659 + ... + 430848.

It is an arithmetic number, because the mean of its divisors is an integer number (46467432).

Almost surely, 2^512001665 is an apocalyptic number.

It is an amenable number.

512001665 is a deficient number, since it is larger than the sum of its proper divisors (231477247).

512001665 is a wasteful number, since it uses less digits than its factorization.

512001665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860536.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 512001665 is about 22627.4537895893. The cubic root of 512001665 is about 800.0008671866. Note that the first 3 decimals are identical.

The spelling of 512001665 in words is "five hundred twelve million, one thousand, six hundred sixty-five".