66535535 has 16 divisors (see below), whose sum is σ = 92225952. Its totient is φ = 45542400.

The previous prime is 66535529. The next prime is 66535543. The reversal of 66535535 is 53553566.

It is a happy number.

It is not a de Polignac number, because 66535535 - 2⁴ = 66535519 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34646 + ... + 36515.

It is an arithmetic number, because the mean of its divisors is an integer number (5764122).

Almost surely, 2^66535535 is an apocalyptic number.

66535535 is a deficient number, since it is larger than the sum of its proper divisors (25690417).

66535535 is a wasteful number, since it uses less digits than its factorization.

66535535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71194.

The product of its digits is 202500, while the sum is 38.

The square root of 66535535 is about 8156.9317148055. The cubic root of 66535535 is about 405.2141021083.

The spelling of 66535535 in words is "sixty-six million, five hundred thirty-five thousand, five hundred thirty-five".