67640467 has 8 divisors (see below), whose sum is σ = 72078336. Its totient is φ = 63253632.

The previous prime is 67640431. The next prime is 67640483. The reversal of 67640467 is 76404676.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 67640467 - 2¹¹ = 67638419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67641467) 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, 10003 + ... + 15340.

It is an arithmetic number, because the mean of its divisors is an integer number (9009792).

Almost surely, 2^67640467 is an apocalyptic number.

67640467 is a deficient number, since it is larger than the sum of its proper divisors (4437869).

67640467 is a wasteful number, since it uses less digits than its factorization.

67640467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25517.

The product of its (nonzero) digits is 169344, while the sum is 40.

The square root of 67640467 is about 8224.3824692192. The cubic root of 67640467 is about 407.4448809486. Note that the first 3 decimals are identical.

The spelling of 67640467 in words is "sixty-seven million, six hundred forty thousand, four hundred sixty-seven".