67329661 has 8 divisors (see below), whose sum is σ = 77000384. Its totient is φ = 57672000.

The previous prime is 67329659. The next prime is 67329719. The reversal of 67329661 is 16692376.

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 67329661 - 2¹ = 67329659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67329611) 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, 13621 + ... + 17893.

It is an arithmetic number, because the mean of its divisors is an integer number (9625048).

Almost surely, 2^67329661 is an apocalyptic number.

It is an amenable number.

67329661 is a deficient number, since it is larger than the sum of its proper divisors (9670723).

67329661 is a wasteful number, since it uses less digits than its factorization.

67329661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6531.

The product of its digits is 81648, while the sum is 40.

The square root of 67329661 is about 8205.4653128266. The cubic root of 67329661 is about 406.8198568106.

The spelling of 67329661 in words is "sixty-seven million, three hundred twenty-nine thousand, six hundred sixty-one".