66754738 has 8 divisors (see below), whose sum is σ = 101123820. Its totient is φ = 33046800.

The previous prime is 66754729. The next prime is 66754739. The reversal of 66754738 is 83745766.

It can be written as a sum of positive squares in 2 ways, for example, as 66536649 + 218089 = 8157^2 + 467^2 .

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

It is not an unprimeable number, because it can be changed into a prime (66754739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165033 + ... + 165436.

Almost surely, 2^66754738 is an apocalyptic number.

66754738 is a deficient number, since it is larger than the sum of its proper divisors (34369082).

66754738 is a wasteful number, since it uses less digits than its factorization.

66754738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330572.

The product of its digits is 846720, while the sum is 46.

The square root of 66754738 is about 8170.3572749299. The cubic root of 66754738 is about 405.6586103474.

The spelling of 66754738 in words is "sixty-six million, seven hundred fifty-four thousand, seven hundred thirty-eight".