1660665016 has 8 divisors (see below), whose sum is σ = 3113746920. Its totient is φ = 830332504.

The previous prime is 1660664989. The next prime is 1660665023. The reversal of 1660665016 is 6105660661.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103791556 + ... + 103791571.

It is an arithmetic number, because the mean of its divisors is an integer number (389218365).

Almost surely, 2^1660665016 is an apocalyptic number.

It is an amenable number.

1660665016 is a deficient number, since it is larger than the sum of its proper divisors (1453081904).

1660665016 is a wasteful number, since it uses less digits than its factorization.

1660665016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207583133 (or 207583129 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 1660665016 is about 40751.2578456175. The cubic root of 1660665016 is about 1184.2062410846.

The spelling of 1660665016 in words is "one billion, six hundred sixty million, six hundred sixty-five thousand, sixteen".