1664466071 has 2 divisors, whose sum is σ = 1664466072. Its totient is φ = 1664466070.

The previous prime is 1664465983. The next prime is 1664466103. The reversal of 1664466071 is 1706644661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1664466071 - 2¹⁴ = 1664449687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1664463071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 832233035 + 832233036.

It is an arithmetic number, because the mean of its divisors is an integer number (832233036).

Almost surely, 2^1664466071 is an apocalyptic number.

1664466071 is a deficient number, since it is larger than the sum of its proper divisors (1).

1664466071 is an equidigital number, since it uses as much as digits as its factorization.

1664466071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 1664466071 is about 40797.8684614772. The cubic root of 1664466071 is about 1185.1090527327.

The spelling of 1664466071 in words is "one billion, six hundred sixty-four million, four hundred sixty-six thousand, seventy-one".