66560051 has 4 divisors (see below), whose sum is σ = 67149192. Its totient is φ = 65970912.

The previous prime is 66560041. The next prime is 66560071. The reversal of 66560051 is 15006566.

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

It is a cyclic number.

It is not a de Polignac number, because 66560051 - 2¹⁴ = 66543667 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66559996 and 66560023.

It is not an unprimeable number, because it can be changed into a prime (66560041) 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, 294401 + ... + 294626.

It is an arithmetic number, because the mean of its divisors is an integer number (16787298).

Almost surely, 2^66560051 is an apocalyptic number.

66560051 is a deficient number, since it is larger than the sum of its proper divisors (589141).

66560051 is a wasteful number, since it uses less digits than its factorization.

66560051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589140.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 66560051 is about 8158.4343473488. The cubic root of 66560051 is about 405.2638650359.

The spelling of 66560051 in words is "sixty-six million, five hundred sixty thousand, fifty-one".