66738266 has 8 divisors (see below), whose sum is σ = 114408480. Its totient is φ = 28602108.

The previous prime is 66738253. The next prime is 66738293. The reversal of 66738266 is 66283766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×66738266² = 8907992297373512, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2383496 + ... + 2383523.

It is an arithmetic number, because the mean of its divisors is an integer number (14301060).

Almost surely, 2^66738266 is an apocalyptic number.

66738266 is a deficient number, since it is larger than the sum of its proper divisors (47670214).

66738266 is a wasteful number, since it uses less digits than its factorization.

66738266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4767028.

The product of its digits is 435456, while the sum is 44.

The square root of 66738266 is about 8169.3491784842. The cubic root of 66738266 is about 405.6252416383.

The spelling of 66738266 in words is "sixty-six million, seven hundred thirty-eight thousand, two hundred sixty-six".