66375788 has 24 divisors (see below), whose sum is σ = 117852672. Its totient is φ = 32707584.

The previous prime is 66375781. The next prime is 66375791. The reversal of 66375788 is 88757366.

It is not an unprimeable number, because it can be changed into a prime (66375781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97706 + ... + 98382.

It is an arithmetic number, because the mean of its divisors is an integer number (4910528).

Almost surely, 2^66375788 is an apocalyptic number.

It is an amenable number.

66375788 is a deficient number, since it is larger than the sum of its proper divisors (51476884).

66375788 is a wasteful number, since it uses less digits than its factorization.

66375788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001 (or 999 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 50.

The square root of 66375788 is about 8147.1337291099. The cubic root of 66375788 is about 404.8895456549.

The spelling of 66375788 in words is "sixty-six million, three hundred seventy-five thousand, seven hundred eighty-eight".