66563051 has 4 divisors (see below), whose sum is σ = 66641400. Its totient is φ = 66484704.

The previous prime is 66563009. The next prime is 66563053. The reversal of 66563051 is 15036566.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15036566 = 2 ⋅7518283.

It is a cyclic number.

It is not a de Polignac number, because 66563051 - 2⁶ = 66562987 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66562999 and 66563017.

It is not an unprimeable number, because it can be changed into a prime (66563053) 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, 37886 + ... + 39603.

It is an arithmetic number, because the mean of its divisors is an integer number (16660350).

Almost surely, 2^66563051 is an apocalyptic number.

66563051 is a deficient number, since it is larger than the sum of its proper divisors (78349).

66563051 is an equidigital number, since it uses as much as digits as its factorization.

66563051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78348.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 66563051 is about 8158.6182040833. The cubic root of 66563051 is about 405.2699536397.

The spelling of 66563051 in words is "sixty-six million, five hundred sixty-three thousand, fifty-one".