67639701 has 8 divisors (see below), whose sum is σ = 90477504. Its totient is φ = 44947520.

The previous prime is 67639697. The next prime is 67639717. The reversal of 67639701 is 10793676.

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 67639701 - 2² = 67639697 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 67639701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67639001) 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, 35316 + ... + 37181.

It is an arithmetic number, because the mean of its divisors is an integer number (11309688).

Almost surely, 2^67639701 is an apocalyptic number.

It is an amenable number.

67639701 is a deficient number, since it is larger than the sum of its proper divisors (22837803).

67639701 is a wasteful number, since it uses less digits than its factorization.

67639701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72811.

The product of its (nonzero) digits is 47628, while the sum is 39.

The square root of 67639701 is about 8224.3359002414. The cubic root of 67639701 is about 407.4433428952.

The spelling of 67639701 in words is "sixty-seven million, six hundred thirty-nine thousand, seven hundred one".