67664673 has 8 divisors (see below), whose sum is σ = 100244000. Its totient is φ = 45109764.

The previous prime is 67664659. The next prime is 67664687. The reversal of 67664673 is 37646676.

It is an interprime number because it is at equal distance from previous prime (67664659) and next prime (67664687).

It is not a de Polignac number, because 67664673 - 2⁶ = 67664609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67664603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1253023 + ... + 1253076.

It is an arithmetic number, because the mean of its divisors is an integer number (12530500).

Almost surely, 2^67664673 is an apocalyptic number.

It is an amenable number.

67664673 is a deficient number, since it is larger than the sum of its proper divisors (32579327).

67664673 is a wasteful number, since it uses less digits than its factorization.

67664673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2506108 (or 2506102 counting only the distinct ones).

The product of its digits is 762048, while the sum is 45.

The square root of 67664673 is about 8225.8539374341. The cubic root of 67664673 is about 407.4934782601.

The spelling of 67664673 in words is "sixty-seven million, six hundred sixty-four thousand, six hundred seventy-three".