1667396045 has 16 divisors (see below), whose sum is σ = 2303172480. Its totient is φ = 1135128384.

The previous prime is 1667395979. The next prime is 1667396051. The reversal of 1667396045 is 5406937661.

It is a cyclic number.

It is not a de Polignac number, because 1667396045 - 2¹⁰ = 1667395021 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 166502 + ... + 176231.

It is an arithmetic number, because the mean of its divisors is an integer number (143948280).

Almost surely, 2^1667396045 is an apocalyptic number.

It is an amenable number.

1667396045 is a deficient number, since it is larger than the sum of its proper divisors (635776435).

1667396045 is a wasteful number, since it uses less digits than its factorization.

1667396045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342884.

The product of its (nonzero) digits is 816480, while the sum is 47.

The square root of 1667396045 is about 40833.7610929975. The cubic root of 1667396045 is about 1185.8040310003.

The spelling of 1667396045 in words is "one billion, six hundred sixty-seven million, three hundred ninety-six thousand, forty-five".