1660686445 has 16 divisors (see below), whose sum is σ = 2224550592. Its totient is φ = 1179682560.

The previous prime is 1660686439. The next prime is 1660686473. The reversal of 1660686445 is 5446860661.

It is not a de Polignac number, because 1660686445 - 2³ = 1660686437 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1660686395 and 1660686404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 348732 + ... + 353461.

It is an arithmetic number, because the mean of its divisors is an integer number (139034412).

Almost surely, 2^1660686445 is an apocalyptic number.

It is an amenable number.

1660686445 is a deficient number, since it is larger than the sum of its proper divisors (563864147).

1660686445 is a wasteful number, since it uses less digits than its factorization.

1660686445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702252.

The product of its (nonzero) digits is 829440, while the sum is 46.

The square root of 1660686445 is about 40751.5207691688. The cubic root of 1660686445 is about 1184.2113346758.

The spelling of 1660686445 in words is "one billion, six hundred sixty million, six hundred eighty-six thousand, four hundred forty-five".