45020665 has 8 divisors (see below), whose sum is σ = 55342728. Its totient is φ = 35137920.

The previous prime is 45020663. The next prime is 45020681. The reversal of 45020665 is 56602054.

It can be written as a sum of positive squares in 4 ways, for example, as 1776889 + 43243776 = 1333^2 + 6576^2 .

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

It is not a de Polignac number, because 45020665 - 2¹ = 45020663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45020663) 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, 109602 + ... + 110011.

It is an arithmetic number, because the mean of its divisors is an integer number (6917841).

Almost surely, 2^45020665 is an apocalyptic number.

It is an amenable number.

45020665 is a deficient number, since it is larger than the sum of its proper divisors (10322063).

45020665 is a wasteful number, since it uses less digits than its factorization.

45020665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219659.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 45020665 is about 6709.7440338660. The cubic root of 45020665 is about 355.7437689317.

It can be divided in two parts, 450 and 20665, that added together give a triangular number (21115 = T₂₀₅).

The spelling of 45020665 in words is "forty-five million, twenty thousand, six hundred sixty-five".