66006745 has 8 divisors (see below), whose sum is σ = 90523584. Its totient is φ = 45261744.

The previous prime is 66006739. The next prime is 66006769. The reversal of 66006745 is 54760066.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66006745 - 2⁵ = 66006713 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66006745.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 942919 + ... + 942988.

It is an arithmetic number, because the mean of its divisors is an integer number (11315448).

Almost surely, 2^66006745 is an apocalyptic number.

It is an amenable number.

66006745 is a deficient number, since it is larger than the sum of its proper divisors (24516839).

66006745 is a wasteful number, since it uses less digits than its factorization.

66006745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1885919.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 66006745 is about 8124.4535200837. The cubic root of 66006745 is about 404.1377683427.

The spelling of 66006745 in words is "sixty-six million, six thousand, seven hundred forty-five".