67056665 has 12 divisors (see below), whose sum is σ = 87135084. Its totient is φ = 49518144.

The previous prime is 67056659. The next prime is 67056667. The reversal of 67056665 is 56665076.

It can be written as a sum of positive squares in 6 ways, for example, as 12931216 + 54125449 = 3596^2 + 7357^2 .

It is not a de Polignac number, because 67056665 - 2¹² = 67052569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67056667) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38834 + ... + 40523.

It is an arithmetic number, because the mean of its divisors is an integer number (7261257).

Almost surely, 2^67056665 is an apocalyptic number.

67056665 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

67056665 is a deficient number, since it is larger than the sum of its proper divisors (20078419).

67056665 is a wasteful number, since it uses less digits than its factorization.

67056665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79388 (or 79375 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 41.

The square root of 67056665 is about 8188.8134061047. The cubic root of 67056665 is about 406.2692790851.

The spelling of 67056665 in words is "sixty-seven million, fifty-six thousand, six hundred sixty-five".