1667040864 has 48 divisors (see below), whose sum is σ = 4378680432. Its totient is φ = 555337728.

The previous prime is 1667040839. The next prime is 1667040871. The reversal of 1667040864 is 4680407661.

It is a tau number, because it is divible by the number of its divisors (48).

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 7 ways as a sum of consecutive naturals, for example, 186972 + ... + 195684.

It is an arithmetic number, because the mean of its divisors is an integer number (91222509).

Almost surely, 2^1667040864 is an apocalyptic number.

It is an amenable number.

1667040864 is an abundant number, since it is smaller than the sum of its proper divisors (2711639568).

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

1667040864 is a wasteful number, since it uses less digits than its factorization.

1667040864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10719 (or 10711 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 1667040864 is about 40829.4117518242. The cubic root of 1667040864 is about 1185.7198268562.

The spelling of 1667040864 in words is "one billion, six hundred sixty-seven million, forty thousand, eight hundred sixty-four".