66886745 has 16 divisors (see below), whose sum is σ = 85337280. Its totient is φ = 50184000.

The previous prime is 66886741. The next prime is 66886753. The reversal of 66886745 is 54768866.

It is a happy number.

It is not a de Polignac number, because 66886745 - 2² = 66886741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66886693 and 66886702.

It is not an unprimeable number, because it can be changed into a prime (66886741) 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, 6110 + ... + 13080.

It is an arithmetic number, because the mean of its divisors is an integer number (5333580).

Almost surely, 2^66886745 is an apocalyptic number.

It is an amenable number.

66886745 is a deficient number, since it is larger than the sum of its proper divisors (18450535).

66886745 is a wasteful number, since it uses less digits than its factorization.

66886745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7096.

The product of its digits is 1935360, while the sum is 50.

The square root of 66886745 is about 8178.4316956248. The cubic root of 66886745 is about 405.9258299157.

The spelling of 66886745 in words is "sixty-six million, eight hundred eighty-six thousand, seven hundred forty-five".