66751689460 has 24 divisors (see below), whose sum is σ = 140185606176. Its totient is φ = 26699331360.

The previous prime is 66751689457. The next prime is 66751689461. The reversal of 66751689460 is 6498615766.

It is a junction number, because it is equal to n+sod(n) for n = 66751689395 and 66751689404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66751689461) 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, 387699 + ... + 532741.

It is an arithmetic number, because the mean of its divisors is an integer number (5841066924).

Almost surely, 2^66751689460 is an apocalyptic number.

It is an amenable number.

66751689460 is an abundant number, since it is smaller than the sum of its proper divisors (73433916716).

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

66751689460 is a wasteful number, since it uses less digits than its factorization.

66751689460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168063 (or 168061 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 58.

The spelling of 66751689460 in words is "sixty-six billion, seven hundred fifty-one million, six hundred eighty-nine thousand, four hundred sixty".