66748888 has 16 divisors (see below), whose sum is σ = 128537280. Its totient is φ = 32472288.

The previous prime is 66748879. The next prime is 66748897. The reversal of 66748888 is 88884766.

It is an interprime number because it is at equal distance from previous prime (66748879) and next prime (66748897).

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, 112456 + ... + 113047.

It is an arithmetic number, because the mean of its divisors is an integer number (8033580).

Almost surely, 2^66748888 is an apocalyptic number.

It is an amenable number.

66748888 is a deficient number, since it is larger than the sum of its proper divisors (61788392).

66748888 is a wasteful number, since it uses less digits than its factorization.

66748888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225546 (or 225542 counting only the distinct ones).

The product of its digits is 4128768, while the sum is 55.

The square root of 66748888 is about 8169.9992656058. Note that the first 3 decimals coincide. The cubic root of 66748888 is about 405.6467601414.

The spelling of 66748888 in words is "sixty-six million, seven hundred forty-eight thousand, eight hundred eighty-eight".