66280051 has 12 divisors (see below), whose sum is σ = 69986592. Its totient is φ = 62744864.

The previous prime is 66280021. The next prime is 66280079. The reversal of 66280051 is 15008266.

It is not a de Polignac number, because 66280051 - 2⁹ = 66279539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66280001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43830 + ... + 45316.

It is an arithmetic number, because the mean of its divisors is an integer number (5832216).

Almost surely, 2^66280051 is an apocalyptic number.

66280051 is a deficient number, since it is larger than the sum of its proper divisors (3706541).

66280051 is a wasteful number, since it uses less digits than its factorization.

66280051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1598 (or 1569 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 66280051 is about 8141.2561070144. The cubic root of 66280051 is about 404.6947880830.

The spelling of 66280051 in words is "sixty-six million, two hundred eighty thousand, fifty-one".