66242835 has 24 divisors (see below), whose sum is σ = 120865680. Its totient is φ = 33469632.

The previous prime is 66242831. The next prime is 66242849. The reversal of 66242835 is 53824266.

66242835 is a `hidden beast` number, since 6 + 624 + 28 + 3 + 5 = 666.

It is not a de Polignac number, because 66242835 - 2² = 66242831 is a prime.

It is a super-2 number, since 2×66242835² = 8776226377674450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66242835.

It is not an unprimeable number, because it can be changed into a prime (66242831) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37884 + ... + 39593.

It is an arithmetic number, because the mean of its divisors is an integer number (5036070).

Almost surely, 2^66242835 is an apocalyptic number.

66242835 is a deficient number, since it is larger than the sum of its proper divisors (54622845).

66242835 is a wasteful number, since it uses less digits than its factorization.

66242835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77507 (or 77504 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 66242835 is about 8138.9701436975. The cubic root of 66242835 is about 404.6190290333.

The spelling of 66242835 in words is "sixty-six million, two hundred forty-two thousand, eight hundred thirty-five".