1664085546 has 40 divisors (see below), whose sum is σ = 3776013120. Its totient is φ = 547669512.

The previous prime is 1664085523. The next prime is 1664085559. The reversal of 1664085546 is 6455804661.

1664085546 is a `hidden beast` number, since 1 + 66 + 40 + 8 + 5 + 546 = 666.

It is a super-2 number, since 2×1664085546² = 5538361408812236232, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 52216 + ... + 77811.

It is an arithmetic number, because the mean of its divisors is an integer number (94400328).

Almost surely, 2^1664085546 is an apocalyptic number.

1664085546 is an abundant number, since it is smaller than the sum of its proper divisors (2111927574).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1664085546 is a wasteful number, since it uses less digits than its factorization.

1664085546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130120 (or 130111 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 45.

The square root of 1664085546 is about 40793.2046546971. The cubic root of 1664085546 is about 1185.0187338810.

The spelling of 1664085546 in words is "one billion, six hundred sixty-four million, eighty-five thousand, five hundred forty-six".