66444535 has 8 divisors (see below), whose sum is σ = 79889040. Its totient is φ = 53051904.

The previous prime is 66444529. The next prime is 66444611. The reversal of 66444535 is 53544466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66444535 - 2⁷ = 66444407 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66444494 and 66444503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10090 + ... + 15319.

It is an arithmetic number, because the mean of its divisors is an integer number (9986130).

Almost surely, 2^66444535 is an apocalyptic number.

66444535 is a deficient number, since it is larger than the sum of its proper divisors (13444505).

66444535 is a wasteful number, since it uses less digits than its factorization.

66444535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25937.

The product of its digits is 172800, while the sum is 37.

The square root of 66444535 is about 8151.3517283945. The cubic root of 66444535 is about 405.0292820367.

The spelling of 66444535 in words is "sixty-six million, four hundred forty-four thousand, five hundred thirty-five".