66668334 has 16 divisors (see below), whose sum is σ = 133459920. Its totient is φ = 22202240.

The previous prime is 66668317. The next prime is 66668351. The reversal of 66668334 is 43386666.

It is an interprime number because it is at equal distance from previous prime (66668317) and next prime (66668351).

It is a super-5 number, since 5×66668334⁵ (a number of 40 digits) contains 55555 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2854 + ... + 11894.

It is an arithmetic number, because the mean of its divisors is an integer number (8341245).

Almost surely, 2^66668334 is an apocalyptic number.

66668334 is an abundant number, since it is smaller than the sum of its proper divisors (66791586).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66668334 is a wasteful number, since it uses less digits than its factorization.

66668334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10275.

The product of its digits is 373248, while the sum is 42.

The square root of 66668334 is about 8165.0679115363. The cubic root of 66668334 is about 405.4835133628.

The spelling of 66668334 in words is "sixty-six million, six hundred sixty-eight thousand, three hundred thirty-four".