67506993 has 16 divisors (see below), whose sum is σ = 102140160. Its totient is φ = 44046288.

The previous prime is 67506953. The next prime is 67507003. The reversal of 67506993 is 39960576.

It is not a de Polignac number, because 67506993 - 2⁸ = 67506737 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (67506953) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25330 + ... + 27867.

It is an arithmetic number, because the mean of its divisors is an integer number (6383760).

Almost surely, 2^67506993 is an apocalyptic number.

It is an amenable number.

67506993 is a deficient number, since it is larger than the sum of its proper divisors (34633167).

67506993 is a wasteful number, since it uses less digits than its factorization.

67506993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53253 (or 53247 counting only the distinct ones).

The product of its (nonzero) digits is 306180, while the sum is 45.

The square root of 67506993 is about 8216.2639319827. The cubic root of 67506993 is about 407.1767026870.

The spelling of 67506993 in words is "sixty-seven million, five hundred six thousand, nine hundred ninety-three".