666704499 has 4 divisors (see below), whose sum is σ = 888939336. Its totient is φ = 444469664.

The previous prime is 666704497. The next prime is 666704501. The reversal of 666704499 is 994407666.

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

It is an interprime number because it is at equal distance from previous prime (666704497) and next prime (666704501).

It is a cyclic number.

It is not a de Polignac number, because 666704499 - 2¹ = 666704497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (666704497) 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, 111117414 + ... + 111117419.

It is an arithmetic number, because the mean of its divisors is an integer number (222234834).

Almost surely, 2^666704499 is an apocalyptic number.

666704499 is a deficient number, since it is larger than the sum of its proper divisors (222234837).

666704499 is a wasteful number, since it uses less digits than its factorization.

666704499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222234836.

The product of its (nonzero) digits is 1959552, while the sum is 51.

The square root of 666704499 is about 25820.6215843074. The cubic root of 666704499 is about 873.5969892174.

The spelling of 666704499 in words is "six hundred sixty-six million, seven hundred four thousand, four hundred ninety-nine".