66820148 has 12 divisors (see below), whose sum is σ = 116992512. Its totient is φ = 33393720.

The previous prime is 66820123. The next prime is 66820153. The reversal of 66820148 is 84102866.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13763 + ... + 17973.

It is an arithmetic number, because the mean of its divisors is an integer number (9749376).

Almost surely, 2^66820148 is an apocalyptic number.

It is an amenable number.

66820148 is a deficient number, since it is larger than the sum of its proper divisors (50172364).

66820148 is a wasteful number, since it uses less digits than its factorization.

66820148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8182 (or 8180 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 66820148 is about 8174.3591797767. The cubic root of 66820148 is about 405.7910627080.

The spelling of 66820148 in words is "sixty-six million, eight hundred twenty thousand, one hundred forty-eight".