66164435 has 4 divisors (see below), whose sum is σ = 79397328. Its totient is φ = 52931544.

The previous prime is 66164431. The next prime is 66164437. The reversal of 66164435 is 53446166.

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 66164435 - 2² = 66164431 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66164395 and 66164404.

It is not an unprimeable number, because it can be changed into a prime (66164431) 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, 6616439 + ... + 6616448.

It is an arithmetic number, because the mean of its divisors is an integer number (19849332).

Almost surely, 2^66164435 is an apocalyptic number.

66164435 is a deficient number, since it is larger than the sum of its proper divisors (13232893).

66164435 is a wasteful number, since it uses less digits than its factorization.

66164435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13232892.

The product of its digits is 51840, while the sum is 35.

The square root of 66164435 is about 8134.1523836230. The cubic root of 66164435 is about 404.4593405440.

The spelling of 66164435 in words is "sixty-six million, one hundred sixty-four thousand, four hundred thirty-five".