1206046665 has 28 divisors (see below), whose sum is σ = 2169897924. Its totient is φ = 643222944.

The previous prime is 1206046631. The next prime is 1206046669. The reversal of 1206046665 is 5666406021.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 605012409 + 601034256 = 24597^2 + 24516^2 .

It is not a de Polignac number, because 1206046665 - 2¹³ = 1206038473 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1206046669) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 161794 + ... + 169083.

Almost surely, 2^1206046665 is an apocalyptic number.

1206046665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1206046665 is a deficient number, since it is larger than the sum of its proper divisors (963851259).

1206046665 is an frugal number, since it uses more digits than its factorization.

1206046665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330900 (or 330885 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 1206046665 is about 34728.1825755394. The cubic root of 1206046665 is about 1064.4404519502.

The spelling of 1206046665 in words is "one billion, two hundred six million, forty-six thousand, six hundred sixty-five".