66234777738 has 16 divisors (see below), whose sum is σ = 132480092640. Its totient is φ = 22076503056.

The previous prime is 66234777671. The next prime is 66234777743. The reversal of 66234777738 is 83777743266.

66234777738 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×66234777738³ (a number of 33 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 356128 + ... + 509211.

It is an arithmetic number, because the mean of its divisors is an integer number (8280005790).

Almost surely, 2^66234777738 is an apocalyptic number.

66234777738 is an abundant number, since it is smaller than the sum of its proper divisors (66245314902).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66234777738 is a wasteful number, since it uses less digits than its factorization.

66234777738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878101.

The product of its digits is 49787136, while the sum is 60.

The spelling of 66234777738 in words is "sixty-six billion, two hundred thirty-four million, seven hundred seventy-seven thousand, seven hundred thirty-eight".