45669681 has 12 divisors (see below), whose sum is σ = 66025908. Its totient is φ = 30419424.

The previous prime is 45669677. The next prime is 45669683. The reversal of 45669681 is 18696654.

45669681 is a `hidden beast` number, since 4 + 566 + 9 + 6 + 81 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 33454656 + 12215025 = 5784^2 + 3495^2 .

It is not a de Polignac number, because 45669681 - 2² = 45669677 is a prime.

It is a super-2 number, since 2×45669681² = 4171439525283522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (45669683) 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, 18771 + ... + 21063.

It is an arithmetic number, because the mean of its divisors is an integer number (5502159).

Almost surely, 2^45669681 is an apocalyptic number.

It is an amenable number.

45669681 is a deficient number, since it is larger than the sum of its proper divisors (20356227).

45669681 is a wasteful number, since it uses less digits than its factorization.

45669681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4512 (or 4509 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 45669681 is about 6757.9346697049. The cubic root of 45669681 is about 357.4450819516.

The spelling of 45669681 in words is "forty-five million, six hundred sixty-nine thousand, six hundred eighty-one".