66623435 has 4 divisors (see below), whose sum is σ = 79948128. Its totient is φ = 53298744.

The previous prime is 66623429. The next prime is 66623441. The reversal of 66623435 is 53432666.

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

It is an interprime number because it is at equal distance from previous prime (66623429) and next prime (66623441).

It is a cyclic number.

It is not a de Polignac number, because 66623435 - 2¹⁰ = 66622411 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66623395 and 66623404.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 6662339 + ... + 6662348.

It is an arithmetic number, because the mean of its divisors is an integer number (19987032).

Almost surely, 2^66623435 is an apocalyptic number.

66623435 is a deficient number, since it is larger than the sum of its proper divisors (13324693).

66623435 is a wasteful number, since it uses less digits than its factorization.

66623435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13324692.

The product of its digits is 77760, while the sum is 35.

The square root of 66623435 is about 8162.3179918452. The cubic root of 66623435 is about 405.3924661758.

The spelling of 66623435 in words is "sixty-six million, six hundred twenty-three thousand, four hundred thirty-five".