66020835 has 16 divisors (see below), whose sum is σ = 107082144. Its totient is φ = 34728192.

The previous prime is 66020831. The next prime is 66020873. The reversal of 66020835 is 53802066.

It is not a de Polignac number, because 66020835 - 2² = 66020831 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66020831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29052 + ... + 31241.

It is an arithmetic number, because the mean of its divisors is an integer number (6692634).

Almost surely, 2^66020835 is an apocalyptic number.

66020835 is a deficient number, since it is larger than the sum of its proper divisors (41061309).

66020835 is a wasteful number, since it uses less digits than its factorization.

66020835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60374.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 66020835 is about 8125.3206090591. The cubic root of 66020835 is about 404.1665224548.

The spelling of 66020835 in words is "sixty-six million, twenty thousand, eight hundred thirty-five".