66026706511 has 4 divisors (see below), whose sum is σ = 66260016712. Its totient is φ = 65793396312.

The previous prime is 66026706479. The next prime is 66026706541. The reversal of 66026706511 is 11560762066.

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 66026706511 - 2⁵ = 66026706479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66026706541) 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, 116654676 + ... + 116655241.

It is an arithmetic number, because the mean of its divisors is an integer number (16565004178).

Almost surely, 2^66026706511 is an apocalyptic number.

66026706511 is a deficient number, since it is larger than the sum of its proper divisors (233310201).

66026706511 is a wasteful number, since it uses less digits than its factorization.

66026706511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233310200.

The product of its (nonzero) digits is 90720, while the sum is 40.

The spelling of 66026706511 in words is "sixty-six billion, twenty-six million, seven hundred six thousand, five hundred eleven".