66733426 has 4 divisors (see below), whose sum is σ = 100100142. Its totient is φ = 33366712.

The previous prime is 66733409. The next prime is 66733441. The reversal of 66733426 is 62433766.

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

It can be written as a sum of positive squares in only one way, i.e., 50339025 + 16394401 = 7095^2 + 4049^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16683355 + ... + 16683358.

Almost surely, 2^66733426 is an apocalyptic number.

66733426 is a deficient number, since it is larger than the sum of its proper divisors (33366716).

66733426 is a wasteful number, since it uses less digits than its factorization.

66733426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33366715.

The product of its digits is 108864, while the sum is 37.

The square root of 66733426 is about 8169.0529438852. The cubic root of 66733426 is about 405.6154358015.

The spelling of 66733426 in words is "sixty-six million, seven hundred thirty-three thousand, four hundred twenty-six".