1662320413 has 8 divisors (see below), whose sum is σ = 1793345400. Its totient is φ = 1531746048.

The previous prime is 1662320371. The next prime is 1662320417. The reversal of 1662320413 is 3140232661.

It can be written as a sum of positive squares in 4 ways, for example, as 8922169 + 1653398244 = 2987^2 + 40662^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1662320413 - 2²¹ = 1660223261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1662320417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104968 + ... + 119761.

It is an arithmetic number, because the mean of its divisors is an integer number (224168175).

Almost surely, 2^1662320413 is an apocalyptic number.

1662320413 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1662320413 is a deficient number, since it is larger than the sum of its proper divisors (131024987).

1662320413 is a wasteful number, since it uses less digits than its factorization.

1662320413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225311.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 1662320413 is about 40771.5637791832. The cubic root of 1662320413 is about 1184.5995936330.

The spelling of 1662320413 in words is "one billion, six hundred sixty-two million, three hundred twenty thousand, four hundred thirteen".