45666621 has 96 divisors (see below), whose sum is σ = 91623168. Its totient is φ = 21150720.

The previous prime is 45666617. The next prime is 45666623. The reversal of 45666621 is 12666654.

It is a happy number.

It is not a de Polignac number, because 45666621 - 2² = 45666617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45666623) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 333265 + ... + 333401.

It is an arithmetic number, because the mean of its divisors is an integer number (954408).

Almost surely, 2^45666621 is an apocalyptic number.

It is an amenable number.

45666621 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

45666621 is a wasteful number, since it uses less digits than its factorization.

45666621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211 (or 208 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 45666621 is about 6757.7082653811. The cubic root of 45666621 is about 357.4370984903.

It can be divided in two parts, 45 and 666621, that added together give a palindrome (666666).

The spelling of 45666621 in words is "forty-five million, six hundred sixty-six thousand, six hundred twenty-one".