72667547 has 4 divisors (see below), whose sum is σ = 72840576. Its totient is φ = 72494520.

The previous prime is 72667513. The next prime is 72667583. The reversal of 72667547 is 74576627.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74576627 = 607 ⋅122861.

It is a cyclic number.

It is not a de Polignac number, because 72667547 - 2¹⁶ = 72602011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72667498 and 72667507.

It is not an unprimeable number, because it can be changed into a prime (72667447) 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 3 ways as a sum of consecutive naturals, for example, 85883 + ... + 86724.

It is an arithmetic number, because the mean of its divisors is an integer number (18210144).

Almost surely, 2^72667547 is an apocalyptic number.

72667547 is a deficient number, since it is larger than the sum of its proper divisors (173029).

72667547 is a wasteful number, since it uses less digits than its factorization.

72667547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173028.

The product of its digits is 493920, while the sum is 44.

The square root of 72667547 is about 8524.5262038427. The cubic root of 72667547 is about 417.2985093929.

The spelling of 72667547 in words is "seventy-two million, six hundred sixty-seven thousand, five hundred forty-seven".