72616647 has 8 divisors (see below), whose sum is σ = 96998256. Its totient is φ = 48323072.

The previous prime is 72616633. The next prime is 72616679. The reversal of 72616647 is 74661627.

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 72616647 - 2⁸ = 72616391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72616627) 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, 20058 + ... + 23399.

It is an arithmetic number, because the mean of its divisors is an integer number (12124782).

Almost surely, 2^72616647 is an apocalyptic number.

72616647 is a deficient number, since it is larger than the sum of its proper divisors (24381609).

72616647 is a wasteful number, since it uses less digits than its factorization.

72616647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44017.

The product of its digits is 84672, while the sum is 39.

The square root of 72616647 is about 8521.5401776909. The cubic root of 72616647 is about 417.2010543563.

The spelling of 72616647 in words is "seventy-two million, six hundred sixteen thousand, six hundred forty-seven".