66424755 has 8 divisors (see below), whose sum is σ = 106279632. Its totient is φ = 35426528.

The previous prime is 66424733. The next prime is 66424777. The reversal of 66424755 is 55742466.

It is an interprime number because it is at equal distance from previous prime (66424733) and next prime (66424777).

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

It is a cyclic number.

It is not a de Polignac number, because 66424755 - 2⁶ = 66424691 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2214144 + ... + 2214173.

It is an arithmetic number, because the mean of its divisors is an integer number (13284954).

Almost surely, 2^66424755 is an apocalyptic number.

66424755 is a deficient number, since it is larger than the sum of its proper divisors (39854877).

66424755 is a wasteful number, since it uses less digits than its factorization.

66424755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4428325.

The product of its digits is 201600, while the sum is 39.

The square root of 66424755 is about 8150.1383423841. The cubic root of 66424755 is about 404.9890867353.

The spelling of 66424755 in words is "sixty-six million, four hundred twenty-four thousand, seven hundred fifty-five".