45166721 has 8 divisors (see below), whose sum is σ = 47282688. Its totient is φ = 43092000.

The previous prime is 45166711. The next prime is 45166729. The reversal of 45166721 is 12766154.

45166721 = 89² + 90² + ... + 514².

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 45166721 - 2¹⁰ = 45165697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (45166729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8060 + ... + 12461.

It is an arithmetic number, because the mean of its divisors is an integer number (5910336).

Almost surely, 2^45166721 is an apocalyptic number.

It is an amenable number.

45166721 is a deficient number, since it is larger than the sum of its proper divisors (2115967).

45166721 is a wasteful number, since it uses less digits than its factorization.

45166721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20623.

The product of its digits is 10080, while the sum is 32.

The square root of 45166721 is about 6720.6190935062. The cubic root of 45166721 is about 356.1280548668.

The spelling of 45166721 in words is "forty-five million, one hundred sixty-six thousand, seven hundred twenty-one".