66207710376043 has 4 divisors (see below), whose sum is σ = 66684024839320. Its totient is φ = 65731395912768.

The previous prime is 66207710376037. The next prime is 66207710376127. The reversal of 66207710376043 is 34067301770266.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66207710376043 - 2²¹ = 66207708278891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66207710379043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 238157231430 + ... + 238157231707.

It is an arithmetic number, because the mean of its divisors is an integer number (16671006209830).

Almost surely, 2^{66207710376043} is an apocalyptic number.

66207710376043 is a deficient number, since it is larger than the sum of its proper divisors (476314463277).

66207710376043 is a wasteful number, since it uses less digits than its factorization.

66207710376043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476314463276.

The product of its (nonzero) digits is 5334336, while the sum is 52.

The spelling of 66207710376043 in words is "sixty-six trillion, two hundred seven billion, seven hundred ten million, three hundred seventy-six thousand, forty-three".