666702755 has 8 divisors (see below), whose sum is σ = 817065792. Its totient is φ = 522013888.

The previous prime is 666702703. The next prime is 666702767. The reversal of 666702755 is 557207666.

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

It is a cyclic number.

It is not a de Polignac number, because 666702755 - 2¹⁰ = 666701731 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1418282 + ... + 1418751.

It is an arithmetic number, because the mean of its divisors is an integer number (102133224).

Almost surely, 2^666702755 is an apocalyptic number.

666702755 is a deficient number, since it is larger than the sum of its proper divisors (150363037).

666702755 is a wasteful number, since it uses less digits than its factorization.

666702755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2837085.

The product of its (nonzero) digits is 529200, while the sum is 44.

The square root of 666702755 is about 25820.5878128287. The cubic root of 666702755 is about 873.5962274834.

The spelling of 666702755 in words is "six hundred sixty-six million, seven hundred two thousand, seven hundred fifty-five".