660121067 has 8 divisors (see below), whose sum is σ = 700302672. Its totient is φ = 620089600.

The previous prime is 660121043. The next prime is 660121073. The reversal of 660121067 is 760121066.

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 660121067 - 2⁶ = 660121003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660121667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28409 + ... + 46122.

It is an arithmetic number, because the mean of its divisors is an integer number (87537834).

Almost surely, 2^660121067 is an apocalyptic number.

660121067 is a deficient number, since it is larger than the sum of its proper divisors (40181605).

660121067 is a wasteful number, since it uses less digits than its factorization.

660121067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75069.

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

The square root of 660121067 is about 25692.8213125768. The cubic root of 660121067 is about 870.7120022490.

Subtracting 660121067 from its reverse (760121066), we obtain a palindrome (99999999).

The spelling of 660121067 in words is "six hundred sixty million, one hundred twenty-one thousand, sixty-seven".