531679665 has 16 divisors (see below), whose sum is σ = 928022976. Its totient is φ = 257784000.

The previous prime is 531679663. The next prime is 531679697. The reversal of 531679665 is 566976135.

It is not a de Polignac number, because 531679665 - 2¹ = 531679663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (531679663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1610986 + ... + 1611315.

It is an arithmetic number, because the mean of its divisors is an integer number (58001436).

Almost surely, 2^531679665 is an apocalyptic number.

531679665 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

531679665 is a deficient number, since it is larger than the sum of its proper divisors (396343311).

531679665 is a wasteful number, since it uses less digits than its factorization.

531679665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3222320.

The product of its digits is 1020600, while the sum is 48.

The square root of 531679665 is about 23058.1800018995. The cubic root of 531679665 is about 810.1212362351.

The spelling of 531679665 in words is "five hundred thirty-one million, six hundred seventy-nine thousand, six hundred sixty-five".