72501667 has 4 divisors (see below), whose sum is σ = 82859056. Its totient is φ = 62144280.

The previous prime is 72501661. The next prime is 72501691. The reversal of 72501667 is 76610527.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72501667 - 2¹¹ = 72499619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72501661) 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, 5178684 + ... + 5178697.

It is an arithmetic number, because the mean of its divisors is an integer number (20714764).

Almost surely, 2^72501667 is an apocalyptic number.

72501667 is a deficient number, since it is larger than the sum of its proper divisors (10357389).

72501667 is a wasteful number, since it uses less digits than its factorization.

72501667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10357388.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 72501667 is about 8514.7910720111. The cubic root of 72501667 is about 416.9807416149.

The spelling of 72501667 in words is "seventy-two million, five hundred one thousand, six hundred sixty-seven".