66229253761 has 16 divisors (see below), whose sum is σ = 73387755648. Its totient is φ = 59263142400.

The previous prime is 66229253693. The next prime is 66229253767. The reversal of 66229253761 is 16735292266.

66229253761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66229253761 - 2²⁵ = 66195699329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66229253767) 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, 409585 + ... + 547921.

It is an arithmetic number, because the mean of its divisors is an integer number (4586734728).

Almost surely, 2^66229253761 is an apocalyptic number.

It is an amenable number.

66229253761 is a deficient number, since it is larger than the sum of its proper divisors (7158501887).

66229253761 is a wasteful number, since it uses less digits than its factorization.

66229253761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139032.

The product of its digits is 1632960, while the sum is 49.

The spelling of 66229253761 in words is "sixty-six billion, two hundred twenty-nine million, two hundred fifty-three thousand, seven hundred sixty-one".