67660079 has 4 divisors (see below), whose sum is σ = 68806920. Its totient is φ = 66513240.

The previous prime is 67660069. The next prime is 67660081. The reversal of 67660079 is 97006676.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 67660079 - 2¹⁶ = 67594543 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 (67660009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 573332 + ... + 573449.

It is an arithmetic number, because the mean of its divisors is an integer number (17201730).

Almost surely, 2^67660079 is an apocalyptic number.

67660079 is a deficient number, since it is larger than the sum of its proper divisors (1146841).

67660079 is a wasteful number, since it uses less digits than its factorization.

67660079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1146840.

The product of its (nonzero) digits is 95256, while the sum is 41.

The square root of 67660079 is about 8225.5746911690. The cubic root of 67660079 is about 407.4842559815.

The spelling of 67660079 in words is "sixty-seven million, six hundred sixty thousand, seventy-nine".