1660049565 has 16 divisors (see below), whose sum is σ = 2692465728. Its totient is φ = 873230976.

The previous prime is 1660049543. The next prime is 1660049591. The reversal of 1660049565 is 5659400661.

It is not a de Polignac number, because 1660049565 - 2⁸ = 1660049309 is a prime.

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, 756919 + ... + 759108.

It is an arithmetic number, because the mean of its divisors is an integer number (168279108).

Almost surely, 2^1660049565 is an apocalyptic number.

1660049565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1660049565 is a deficient number, since it is larger than the sum of its proper divisors (1032416163).

1660049565 is a wasteful number, since it uses less digits than its factorization.

1660049565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1516108.

The product of its (nonzero) digits is 194400, while the sum is 42.

The square root of 1660049565 is about 40743.7058329259. The cubic root of 1660049565 is about 1184.0599320333.

The spelling of 1660049565 in words is "one billion, six hundred sixty million, forty-nine thousand, five hundred sixty-five".