1667545845 has 16 divisors (see below), whose sum is σ = 3049226880. Its totient is φ = 762306624.

The previous prime is 1667545823. The next prime is 1667545883. The reversal of 1667545845 is 5485457661.

It is a happy number.

It is not a de Polignac number, because 1667545845 - 2⁵ = 1667545813 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, 7940590 + ... + 7940799.

It is an arithmetic number, because the mean of its divisors is an integer number (190576680).

Almost surely, 2^1667545845 is an apocalyptic number.

1667545845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1667545845 is a deficient number, since it is larger than the sum of its proper divisors (1381681035).

1667545845 is a wasteful number, since it uses less digits than its factorization.

1667545845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15881404.

The product of its digits is 4032000, while the sum is 51.

The square root of 1667545845 is about 40835.5953183004. The cubic root of 1667545845 is about 1185.8395410850.

The spelling of 1667545845 in words is "one billion, six hundred sixty-seven million, five hundred forty-five thousand, eight hundred forty-five".