340387666 has 8 divisors (see below), whose sum is σ = 511379964. Its totient is φ = 169927680.

The previous prime is 340387643. The next prime is 340387667. The reversal of 340387666 is 666783043.

It can be written as a sum of positive squares in 2 ways, for example, as 276723225 + 63664441 = 16635^2 + 7979^2 .

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

It is not an unprimeable number, because it can be changed into a prime (340387667) 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, 131475 + ... + 134038.

Almost surely, 2^340387666 is an apocalyptic number.

340387666 is a deficient number, since it is larger than the sum of its proper divisors (170992298).

340387666 is a wasteful number, since it uses less digits than its factorization.

340387666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266156.

The product of its (nonzero) digits is 435456, while the sum is 43.

The square root of 340387666 is about 18449.5979902002. The cubic root of 340387666 is about 698.2183713154.

The spelling of 340387666 in words is "three hundred forty million, three hundred eighty-seven thousand, six hundred sixty-six".