67645033 has 4 divisors (see below), whose sum is σ = 67667328. Its totient is φ = 67622740.

The previous prime is 67645027. The next prime is 67645049. The reversal of 67645033 is 33054676.

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 a cyclic number.

It is not a de Polignac number, because 67645033 - 2²⁵ = 34090601 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 67645033.

It is not an unprimeable number, because it can be changed into a prime (67645733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5713 + ... + 12958.

It is an arithmetic number, because the mean of its divisors is an integer number (16916832).

Almost surely, 2^67645033 is an apocalyptic number.

It is an amenable number.

67645033 is a deficient number, since it is larger than the sum of its proper divisors (22295).

67645033 is a wasteful number, since it uses less digits than its factorization.

67645033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22294.

The product of its (nonzero) digits is 45360, while the sum is 34.

The square root of 67645033 is about 8224.6600537651. The cubic root of 67645033 is about 407.4540487912.

The spelling of 67645033 in words is "sixty-seven million, six hundred forty-five thousand, thirty-three".