66148605 has 12 divisors (see below), whose sum is σ = 114657660. Its totient is φ = 35279232.

The previous prime is 66148597. The next prime is 66148613. The reversal of 66148605 is 50684166.

66148605 is a `hidden beast` number, since 6 + 6 + 1 + 48 + 605 = 666.

It is an interprime number because it is at equal distance from previous prime (66148597) and next prime (66148613).

It can be written as a sum of positive squares in 2 ways, for example, as 24235929 + 41912676 = 4923^2 + 6474^2 .

It is not a de Polignac number, because 66148605 - 2³ = 66148597 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66148605.

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 11 ways as a sum of consecutive naturals, for example, 734940 + ... + 735029.

It is an arithmetic number, because the mean of its divisors is an integer number (9554805).

Almost surely, 2^66148605 is an apocalyptic number.

It is an amenable number.

66148605 is a deficient number, since it is larger than the sum of its proper divisors (48509055).

66148605 is a wasteful number, since it uses less digits than its factorization.

66148605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1469980 (or 1469977 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 66148605 is about 8133.1792676665. The cubic root of 66148605 is about 404.4270820149.

The spelling of 66148605 in words is "sixty-six million, one hundred forty-eight thousand, six hundred five".