1667539680 has 96 divisors (see below), whose sum is σ = 5394773664. Its totient is φ = 432654336.

The previous prime is 1667539669. The next prime is 1667539697. The reversal of 1667539680 is 869357661.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29187 + ... + 64706.

It is an arithmetic number, because the mean of its divisors is an integer number (56195559).

Almost surely, 2^1667539680 is an apocalyptic number.

1667539680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1667539680 is an abundant number, since it is smaller than the sum of its proper divisors (3727233984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1667539680 is a wasteful number, since it uses less digits than its factorization.

1667539680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93948 (or 93940 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 51.

The square root of 1667539680 is about 40835.5198326163. The cubic root of 1667539680 is about 1185.8380797139.

The spelling of 1667539680 in words is "one billion, six hundred sixty-seven million, five hundred thirty-nine thousand, six hundred eighty".