66535870 has 8 divisors (see below), whose sum is σ = 119764584. Its totient is φ = 26614344.

The previous prime is 66535823. The next prime is 66535873. The reversal of 66535870 is 7853566.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66535873) by changing a digit.

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, 3326784 + ... + 3326803.

It is an arithmetic number, because the mean of its divisors is an integer number (14970573).

Almost surely, 2^66535870 is an apocalyptic number.

66535870 is a deficient number, since it is larger than the sum of its proper divisors (53228714).

66535870 is a wasteful number, since it uses less digits than its factorization.

66535870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6653594.

The product of its (nonzero) digits is 151200, while the sum is 40.

The square root of 66535870 is about 8156.9522494618. The cubic root of 66535870 is about 405.2147821784.

The spelling of 66535870 in words is "sixty-six million, five hundred thirty-five thousand, eight hundred seventy".