742553666 has 16 divisors (see below), whose sum is σ = 1193673024. Its totient is φ = 345535344.

The previous prime is 742553639. The next prime is 742553681. The reversal of 742553666 is 666355247.

It is a happy number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 216440 + ... + 219843.

It is an arithmetic number, because the mean of its divisors is an integer number (74604564).

Almost surely, 2^742553666 is an apocalyptic number.

742553666 is a deficient number, since it is larger than the sum of its proper divisors (451119358).

742553666 is a wasteful number, since it uses less digits than its factorization.

742553666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436345.

The product of its digits is 907200, while the sum is 44.

The square root of 742553666 is about 27249.8379077748. The cubic root of 742553666 is about 905.5434262557.

The spelling of 742553666 in words is "seven hundred forty-two million, five hundred fifty-three thousand, six hundred sixty-six".