744506666 has 4 divisors (see below), whose sum is σ = 1116760002. Its totient is φ = 372253332.

The previous prime is 744506617. The next prime is 744506669. The reversal of 744506666 is 666605447.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 666605447 = 25301 ⋅26347.

It can be written as a sum of positive squares in only one way, i.e., 492618025 + 251888641 = 22195^2 + 15871^2 .

It is not an unprimeable number, because it can be changed into a prime (744506669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 186126665 + ... + 186126668.

Almost surely, 2^744506666 is an apocalyptic number.

744506666 is a deficient number, since it is larger than the sum of its proper divisors (372253336).

744506666 is a wasteful number, since it uses less digits than its factorization.

744506666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372253335.

The product of its (nonzero) digits is 725760, while the sum is 44.

The square root of 744506666 is about 27285.6494516806. The cubic root of 744506666 is about 906.3366250862.

The spelling of 744506666 in words is "seven hundred forty-four million, five hundred six thousand, six hundred sixty-six".