1664374807 has 2 divisors, whose sum is σ = 1664374808. Its totient is φ = 1664374806.

The previous prime is 1664374799. The next prime is 1664374819. The reversal of 1664374807 is 7084734661.

It is a weak prime.

It is an emirp because it is prime and its reverse (7084734661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1664374807 - 2³ = 1664374799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1664374897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 832187403 + 832187404.

It is an arithmetic number, because the mean of its divisors is an integer number (832187404).

Almost surely, 2^1664374807 is an apocalyptic number.

1664374807 is a deficient number, since it is larger than the sum of its proper divisors (1).

1664374807 is an equidigital number, since it uses as much as digits as its factorization.

1664374807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 677376, while the sum is 46.

The square root of 1664374807 is about 40796.7499563384. The cubic root of 1664374807 is about 1185.0873921792.

The spelling of 1664374807 in words is "one billion, six hundred sixty-four million, three hundred seventy-four thousand, eight hundred seven".