65628678766 has 16 divisors (see below), whose sum is σ = 113557769856. Its totient is φ = 27863710776.

The previous prime is 65628678757. The next prime is 65628678767. The reversal of 65628678766 is 66787682656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65628678767) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21903936 + ... + 21906931.

It is an arithmetic number, because the mean of its divisors is an integer number (7097360616).

Almost surely, 2^65628678766 is an apocalyptic number.

65628678766 is a deficient number, since it is larger than the sum of its proper divisors (47929091090).

65628678766 is a wasteful number, since it uses less digits than its factorization.

65628678766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43810983.

The product of its digits is 243855360, while the sum is 67.

The spelling of 65628678766 in words is "sixty-five billion, six hundred twenty-eight million, six hundred seventy-eight thousand, seven hundred sixty-six".