1662820706 has 8 divisors (see below), whose sum is σ = 2494626780. Its totient is φ = 831278448.

The previous prime is 1662820703. The next prime is 1662820729. The reversal of 1662820706 is 6070282661.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1568556025 + 94264681 = 39605^2 + 9709^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 1662820706.

It is not an unprimeable number, because it can be changed into a prime (1662820703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49361 + ... + 75908.

Almost surely, 2^1662820706 is an apocalyptic number.

1662820706 is a deficient number, since it is larger than the sum of its proper divisors (831806074).

1662820706 is a wasteful number, since it uses less digits than its factorization.

1662820706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131908.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 1662820706 is about 40777.6986354061. The cubic root of 1662820706 is about 1184.7184209933.

The spelling of 1662820706 in words is "one billion, six hundred sixty-two million, eight hundred twenty thousand, seven hundred six".