66424085 has 16 divisors (see below), whose sum is σ = 98103936. Its totient is φ = 42043968.

The previous prime is 66424081. The next prime is 66424091. The reversal of 66424085 is 58042466.

It is a cyclic number.

It is not a de Polignac number, because 66424085 - 2² = 66424081 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66424081) 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, 72539 + ... + 73448.

It is an arithmetic number, because the mean of its divisors is an integer number (6131496).

Almost surely, 2^66424085 is an apocalyptic number.

66424085 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

66424085 is a deficient number, since it is larger than the sum of its proper divisors (31679851).

66424085 is a wasteful number, since it uses less digits than its factorization.

66424085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146012.

The product of its (nonzero) digits is 46080, while the sum is 35.

The square root of 66424085 is about 8150.0972386837. The cubic root of 66424085 is about 404.9877250763.

The spelling of 66424085 in words is "sixty-six million, four hundred twenty-four thousand, eighty-five".