66801506616303 has 16 divisors (see below), whose sum is σ = 89857074978816. Its totient is φ = 44140818244320.

The previous prime is 66801506616269. The next prime is 66801506616319. The reversal of 66801506616303 is 30361660510866.

It is not a de Polignac number, because 66801506616303 - 2¹⁸ = 66801506354159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66801506616323) 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, 84637276 + ... + 85422897.

It is an arithmetic number, because the mean of its divisors is an integer number (5616067186176).

Almost surely, 2^{66801506616303} is an apocalyptic number.

66801506616303 is a deficient number, since it is larger than the sum of its proper divisors (23055568362513).

66801506616303 is a wasteful number, since it uses less digits than its factorization.

66801506616303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170061334.

The product of its (nonzero) digits is 2799360, while the sum is 51.

The spelling of 66801506616303 in words is "sixty-six trillion, eight hundred one billion, five hundred six million, six hundred sixteen thousand, three hundred three".