66801045 has 8 divisors (see below), whose sum is σ = 106881696. Its totient is φ = 35627216.

The previous prime is 66801029. The next prime is 66801067. The reversal of 66801045 is 54010866.

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 66801045 - 2⁴ = 66801029 is a prime.

It is a super-2 number, since 2×66801045² = 8924759226184050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2226687 + ... + 2226716.

It is an arithmetic number, because the mean of its divisors is an integer number (13360212).

Almost surely, 2^66801045 is an apocalyptic number.

It is an amenable number.

66801045 is a deficient number, since it is larger than the sum of its proper divisors (40080651).

66801045 is a wasteful number, since it uses less digits than its factorization.

66801045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4453411.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 66801045 is about 8173.1906254534. The cubic root of 66801045 is about 405.7523889160.

The spelling of 66801045 in words is "sixty-six million, eight hundred one thousand, forty-five".