1665167004 has 48 divisors (see below), whose sum is σ = 4324269600. Its totient is φ = 554133888.

The previous prime is 1665166991. The next prime is 1665167029. The reversal of 1665167004 is 4007615661.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1665167004.

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, 54142 + ... + 79130.

It is an arithmetic number, because the mean of its divisors is an integer number (90088950).

Almost surely, 2^1665167004 is an apocalyptic number.

It is an amenable number.

1665167004 is an abundant number, since it is smaller than the sum of its proper divisors (2659102596).

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

1665167004 is a wasteful number, since it uses less digits than its factorization.

1665167004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25619 (or 25611 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 1665167004 is about 40806.4578712733. The cubic root of 1665167004 is about 1185.2753854447.

The spelling of 1665167004 in words is "one billion, six hundred sixty-five million, one hundred sixty-seven thousand, four".