1664674461 has 12 divisors (see below), whose sum is σ = 2412265440. Its totient is φ = 1106212680.

The previous prime is 1664674409. The next prime is 1664674469. The reversal of 1664674461 is 1644764661.

1664674461 is a `hidden beast` number, since 166 + 46 + 7 + 446 + 1 = 666.

It is not a de Polignac number, because 1664674461 - 2⁶ = 1664674397 is a prime.

It is a super-2 number, since 2×1664674461² = 5542282122211281042, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664674469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 294571 + ... + 300168.

It is an arithmetic number, because the mean of its divisors is an integer number (201022120).

Almost surely, 2^1664674461 is an apocalyptic number.

It is an amenable number.

1664674461 is a deficient number, since it is larger than the sum of its proper divisors (747590979).

1664674461 is a wasteful number, since it uses less digits than its factorization.

1664674461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595056 (or 595053 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 1664674461 is about 40800.4223139908. The cubic root of 1664674461 is about 1185.1585089465.

The spelling of 1664674461 in words is "one billion, six hundred sixty-four million, six hundred seventy-four thousand, four hundred sixty-one".