340212665 has 16 divisors (see below), whose sum is σ = 458777088. Its totient is φ = 240309696.

The previous prime is 340212661. The next prime is 340212707. The reversal of 340212665 is 566212043.

It is a cyclic number.

It is not a de Polignac number, because 340212665 - 2² = 340212661 is a prime.

It is a super-3 number, since 3×340212665³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (340212661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112289 + ... + 115278.

It is an arithmetic number, because the mean of its divisors is an integer number (28673568).

Almost surely, 2^340212665 is an apocalyptic number.

It is an amenable number.

340212665 is a deficient number, since it is larger than the sum of its proper divisors (118564423).

340212665 is a wasteful number, since it uses less digits than its factorization.

340212665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227608.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 340212665 is about 18444.8547025993. The cubic root of 340212665 is about 698.0986941831.

The spelling of 340212665 in words is "three hundred forty million, two hundred twelve thousand, six hundred sixty-five".