666704741 has 4 divisors (see below), whose sum is σ = 667745484. Its totient is φ = 665664000.

The previous prime is 666704681. The next prime is 666704747. The reversal of 666704741 is 147407666.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 256480225 + 410224516 = 16015^2 + 20254^2 .

It is a cyclic number.

It is not a de Polignac number, because 666704741 - 2¹⁴ = 666688357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666704747) 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, 519410 + ... + 520691.

It is an arithmetic number, because the mean of its divisors is an integer number (166936371).

Almost surely, 2^666704741 is an apocalyptic number.

It is an amenable number.

666704741 is a deficient number, since it is larger than the sum of its proper divisors (1040743).

666704741 is a wasteful number, since it uses less digits than its factorization.

666704741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040742.

The product of its (nonzero) digits is 169344, while the sum is 41.

The square root of 666704741 is about 25820.6262704838. The cubic root of 666704741 is about 873.5970949166.

The spelling of 666704741 in words is "six hundred sixty-six million, seven hundred four thousand, seven hundred forty-one".