66285451 has 4 divisors (see below), whose sum is σ = 66308400. Its totient is φ = 66262504.

The previous prime is 66285449. The next prime is 66285487. The reversal of 66285451 is 15458266.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15458266 = 2 ⋅7729133.

It is a cyclic number.

It is not a de Polignac number, because 66285451 - 2¹ = 66285449 is a prime.

It is a super-2 number, since 2×66285451² = 8787522028546802, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66285451.

It is not an unprimeable number, because it can be changed into a prime (66285251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6391 + ... + 13168.

It is an arithmetic number, because the mean of its divisors is an integer number (16577100).

Almost surely, 2^66285451 is an apocalyptic number.

66285451 is a deficient number, since it is larger than the sum of its proper divisors (22949).

66285451 is a wasteful number, since it uses less digits than its factorization.

66285451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22948.

The product of its digits is 57600, while the sum is 37.

The square root of 66285451 is about 8141.5877444145. The cubic root of 66285451 is about 404.7057782803.

The spelling of 66285451 in words is "sixty-six million, two hundred eighty-five thousand, four hundred fifty-one".