66623562 has 24 divisors (see below), whose sum is σ = 145325700. Its totient is φ = 22057920.

The previous prime is 66623551. The next prime is 66623591. The reversal of 66623562 is 26532666.

66623562 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 52403121 + 14220441 = 7239^2 + 3771^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9739 + ... + 15102.

Almost surely, 2^66623562 is an apocalyptic number.

66623562 is an abundant number, since it is smaller than the sum of its proper divisors (78702138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66623562 is a wasteful number, since it uses less digits than its factorization.

66623562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24998 (or 24995 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The square root of 66623562 is about 8162.3257714943. The cubic root of 66623562 is about 405.3927237669.

The spelling of 66623562 in words is "sixty-six million, six hundred twenty-three thousand, five hundred sixty-two".