1662884645 has 8 divisors (see below), whose sum is σ = 2004176760. Its totient is φ = 1324497600.

The previous prime is 1662884603. The next prime is 1662884647. The reversal of 1662884645 is 5464882661.

It can be written as a sum of positive squares in 4 ways, for example, as 463024324 + 1199860321 = 21518^2 + 34639^2 .

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

It is not a de Polignac number, because 1662884645 - 2³⁰ = 589142821 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1662884593 and 1662884602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1662884647) 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, 725006 + ... + 727295.

It is an arithmetic number, because the mean of its divisors is an integer number (250522095).

Almost surely, 2^1662884645 is an apocalyptic number.

It is an amenable number.

1662884645 is a deficient number, since it is larger than the sum of its proper divisors (341292115).

1662884645 is a wasteful number, since it uses less digits than its factorization.

1662884645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1452535.

The product of its digits is 2211840, while the sum is 50.

The square root of 1662884645 is about 40778.4826225793. The cubic root of 1662884645 is about 1184.7336057814.

The spelling of 1662884645 in words is "one billion, six hundred sixty-two million, eight hundred eighty-four thousand, six hundred forty-five".