72851669 has 8 divisors (see below), whose sum is σ = 79540608. Its totient is φ = 66173760.

The previous prime is 72851663. The next prime is 72851677. The reversal of 72851669 is 96615827.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72851669 is a prime.

It is a super-2 number, since 2×72851669² = 10614731352171122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72851663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17684 + ... + 21410.

It is an arithmetic number, because the mean of its divisors is an integer number (9942576).

Almost surely, 2^72851669 is an apocalyptic number.

It is an amenable number.

72851669 is a deficient number, since it is larger than the sum of its proper divisors (6688939).

72851669 is a wasteful number, since it uses less digits than its factorization.

72851669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5515.

The product of its digits is 181440, while the sum is 44.

The square root of 72851669 is about 8535.3189161273. The cubic root of 72851669 is about 417.6506566614.

The spelling of 72851669 in words is "seventy-two million, eight hundred fifty-one thousand, six hundred sixty-nine".