66249055 has 8 divisors (see below), whose sum is σ = 81647712. Its totient is φ = 51566688.

The previous prime is 66249049. The next prime is 66249061. The reversal of 66249055 is 55094266.

It is an interprime number because it is at equal distance from previous prime (66249049) and next prime (66249061).

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 66249055 - 2³ = 66249047 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 178867 + ... + 179236.

It is an arithmetic number, because the mean of its divisors is an integer number (10205964).

Almost surely, 2^66249055 is an apocalyptic number.

66249055 is a deficient number, since it is larger than the sum of its proper divisors (15398657).

66249055 is a wasteful number, since it uses less digits than its factorization.

66249055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358145.

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 66249055 is about 8139.3522469543. The cubic root of 66249055 is about 404.6316928008.

The spelling of 66249055 in words is "sixty-six million, two hundred forty-nine thousand, fifty-five".