1664415063 has 12 divisors (see below), whose sum is σ = 2413030048. Its totient is φ = 1105513920.

The previous prime is 1664415043. The next prime is 1664415091. The reversal of 1664415063 is 3605144661.

It is a happy number.

1664415063 is a `hidden beast` number, since 1 + 6 + 644 + 1 + 5 + 0 + 6 + 3 = 666.

It is not a de Polignac number, because 1664415063 - 2¹⁰ = 1664414039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664415043) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 338770 + ... + 343647.

Almost surely, 2^1664415063 is an apocalyptic number.

1664415063 is a deficient number, since it is larger than the sum of its proper divisors (748614985).

1664415063 is a wasteful number, since it uses less digits than its factorization.

1664415063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682694 (or 682691 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 1664415063 is about 40797.2433259896. The cubic root of 1664415063 is about 1185.0969466163.

The spelling of 1664415063 in words is "one billion, six hundred sixty-four million, four hundred fifteen thousand, sixty-three".