72665033 has 4 divisors (see below), whose sum is σ = 83045760. Its totient is φ = 62284308.

The previous prime is 72665009. The next prime is 72665057. The reversal of 72665033 is 33056627.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (72665009) and next prime (72665057).

It is a cyclic number.

It is not a de Polignac number, because 72665033 - 2⁸ = 72664777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72665093) 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, 5190353 + ... + 5190366.

It is an arithmetic number, because the mean of its divisors is an integer number (20761440).

Almost surely, 2^72665033 is an apocalyptic number.

It is an amenable number.

72665033 is a deficient number, since it is larger than the sum of its proper divisors (10380727).

72665033 is a wasteful number, since it uses less digits than its factorization.

72665033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10380726.

The product of its (nonzero) digits is 22680, while the sum is 32.

The square root of 72665033 is about 8524.3787456917. The cubic root of 72665033 is about 417.2936970634.

The spelling of 72665033 in words is "seventy-two million, six hundred sixty-five thousand, thirty-three".