66847028 has 12 divisors (see below), whose sum is σ = 117415872. Its totient is φ = 33299640.

The previous prime is 66847021. The next prime is 66847031. The reversal of 66847028 is 82074866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66847021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29750 + ... + 31917.

It is an arithmetic number, because the mean of its divisors is an integer number (9784656).

Almost surely, 2^66847028 is an apocalyptic number.

It is an amenable number.

66847028 is a deficient number, since it is larger than the sum of its proper divisors (50568844).

66847028 is a wasteful number, since it uses less digits than its factorization.

66847028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61942 (or 61940 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 66847028 is about 8176.0031800385. The cubic root of 66847028 is about 405.8454684613.

The spelling of 66847028 in words is "sixty-six million, eight hundred forty-seven thousand, twenty-eight".