72165673 has 8 divisors (see below), whose sum is σ = 73956960. Its totient is φ = 70393440.

The previous prime is 72165671. The next prime is 72165679. The reversal of 72165673 is 37656127.

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

It is a cyclic number.

It is not a de Polignac number, because 72165673 - 2¹ = 72165671 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72165671) 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 7 ways as a sum of consecutive naturals, for example, 3061 + ... + 12397.

It is an arithmetic number, because the mean of its divisors is an integer number (9244620).

Almost surely, 2^72165673 is an apocalyptic number.

It is an amenable number.

72165673 is a deficient number, since it is larger than the sum of its proper divisors (1791287).

72165673 is a wasteful number, since it uses less digits than its factorization.

72165673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9527.

The product of its digits is 52920, while the sum is 37.

The square root of 72165673 is about 8495.0381399968. The cubic root of 72165673 is about 416.3356069662.

The spelling of 72165673 in words is "seventy-two million, one hundred sixty-five thousand, six hundred seventy-three".