66562828 has 24 divisors (see below), whose sum is σ = 125475840. Its totient is φ = 30806160.

The previous prime is 66562813. The next prime is 66562829. The reversal of 66562828 is 82826566.

It is a super-2 number, since 2×66562828² = 8861220142715168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66562829) 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, 8818 + ... + 14521.

It is an arithmetic number, because the mean of its divisors is an integer number (5228160).

Almost surely, 2^66562828 is an apocalyptic number.

It is an amenable number.

66562828 is a deficient number, since it is larger than the sum of its proper divisors (58913012).

66562828 is a wasteful number, since it uses less digits than its factorization.

66562828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23397 (or 23395 counting only the distinct ones).

The product of its digits is 276480, while the sum is 43.

The square root of 66562828 is about 8158.6045375419. The cubic root of 66562828 is about 405.2695010598.

The spelling of 66562828 in words is "sixty-six million, five hundred sixty-two thousand, eight hundred twenty-eight".