665703543 has 8 divisors (see below), whose sum is σ = 887724928. Its totient is φ = 443742264.

The previous prime is 665703539. The next prime is 665703547. The reversal of 665703543 is 345307566.

It is an interprime number because it is at equal distance from previous prime (665703539) and next prime (665703547).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 665703543 - 2² = 665703539 is a prime.

It is a super-2 number, since 2×665703543² = 886322414325505698, 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 (665703547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30696 + ... + 47682.

It is an arithmetic number, because the mean of its divisors is an integer number (110965616).

Almost surely, 2^665703543 is an apocalyptic number.

665703543 is a deficient number, since it is larger than the sum of its proper divisors (222021385).

665703543 is a wasteful number, since it uses less digits than its factorization.

665703543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30053.

The product of its (nonzero) digits is 226800, while the sum is 39.

The square root of 665703543 is about 25801.2314241007. The cubic root of 665703543 is about 873.1595789785.

The spelling of 665703543 in words is "six hundred sixty-five million, seven hundred three thousand, five hundred forty-three".