67665923 has 4 divisors (see below), whose sum is σ = 72871008. Its totient is φ = 62460840.

The previous prime is 67665881. The next prime is 67665929. The reversal of 67665923 is 32956676.

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

It is not a de Polignac number, because 67665923 - 2¹⁴ = 67649539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67665929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2602523 + ... + 2602548.

It is an arithmetic number, because the mean of its divisors is an integer number (18217752).

Almost surely, 2^67665923 is an apocalyptic number.

67665923 is a deficient number, since it is larger than the sum of its proper divisors (5205085).

67665923 is a wasteful number, since it uses less digits than its factorization.

67665923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5205084.

The product of its digits is 408240, while the sum is 44.

The square root of 67665923 is about 8225.9299170367. The cubic root of 67665923 is about 407.4959875149.

The spelling of 67665923 in words is "sixty-seven million, six hundred sixty-five thousand, nine hundred twenty-three".