66947748 has 48 divisors (see below), whose sum is σ = 179364864. Its totient is φ = 19038240.

The previous prime is 66947743. The next prime is 66947753. The reversal of 66947748 is 84774966.

It is an interprime number because it is at equal distance from previous prime (66947743) and next prime (66947753).

It is a self number, because there is not a number n which added to its sum of digits gives 66947748.

It is not an unprimeable number, because it can be changed into a prime (66947743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17313 + ... + 20823.

It is an arithmetic number, because the mean of its divisors is an integer number (3736768).

Almost surely, 2^66947748 is an apocalyptic number.

It is an amenable number.

66947748 is an abundant number, since it is smaller than the sum of its proper divisors (112417116).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66947748 is a wasteful number, since it uses less digits than its factorization.

66947748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3752 (or 3750 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 51.

The square root of 66947748 is about 8182.1603504209. The cubic root of 66947748 is about 406.0491984998.

The spelling of 66947748 in words is "sixty-six million, nine hundred forty-seven thousand, seven hundred forty-eight".