67012661 has 8 divisors (see below), whose sum is σ = 68983680. Its totient is φ = 65050128.

The previous prime is 67012651. The next prime is 67012667. The reversal of 67012661 is 16621076.

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 67012661 - 2¹⁴ = 66996277 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 (67012667) 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, 16160 + ... + 19878.

It is an arithmetic number, because the mean of its divisors is an integer number (8622960).

Almost surely, 2^67012661 is an apocalyptic number.

It is an amenable number.

67012661 is a deficient number, since it is larger than the sum of its proper divisors (1971019).

67012661 is a wasteful number, since it uses less digits than its factorization.

67012661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4243.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 67012661 is about 8186.1261290063. The cubic root of 67012661 is about 406.1803921449.

It can be divided in two parts, 670 and 12661, that added together give a palindrome (13331).

The spelling of 67012661 in words is "sixty-seven million, twelve thousand, six hundred sixty-one".