66382851 has 4 divisors (see below), whose sum is σ = 88510472. Its totient is φ = 44255232.

The previous prime is 66382837. The next prime is 66382861. The reversal of 66382851 is 15828366.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 66382851 - 2⁶ = 66382787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66382861) 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, 11063806 + ... + 11063811.

It is an arithmetic number, because the mean of its divisors is an integer number (22127618).

Almost surely, 2^66382851 is an apocalyptic number.

66382851 is a deficient number, since it is larger than the sum of its proper divisors (22127621).

66382851 is a wasteful number, since it uses less digits than its factorization.

66382851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22127620.

The product of its digits is 69120, while the sum is 39.

The square root of 66382851 is about 8147.5671829080. The cubic root of 66382851 is about 404.9039064810.

The spelling of 66382851 in words is "sixty-six million, three hundred eighty-two thousand, eight hundred fifty-one".