72669 has 4 divisors (see below), whose sum is σ = 96896. Its totient is φ = 48444.

The previous prime is 72661. The next prime is 72671. The reversal of 72669 is 96627.

72669 is nontrivially palindromic in base 5.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 72669 - 2³ = 72661 is a prime.

It is a super-2 number, since 2×72669² = 10561567122, which contains 22 as substring.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

72669 is a lucky number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72661) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 12109 + ... + 12114.

It is an arithmetic number, because the mean of its divisors is an integer number (24224).

2⁷²⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

72669 is a deficient number, since it is larger than the sum of its proper divisors (24227).

72669 is a wasteful number, since it uses less digits than its factorization.

72669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24226.

The product of its digits is 4536, while the sum is 30.

The square root of 72669 is about 269.5718828068. The cubic root of 72669 is about 41.7301290693.

It can be divided in two parts, 72 and 669, that added together give a triangular number (741 = T₃₈).

The spelling of 72669 in words is "seventy-two thousand, six hundred sixty-nine".