66726739380 has 48 divisors (see below), whose sum is σ = 213525567360. Its totient is φ = 15251826048.

The previous prime is 66726739357. The next prime is 66726739441. The reversal of 66726739380 is 8393762766.

It is a self number, because there is not a number n which added to its sum of digits gives 66726739380.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79436175 + ... + 79437014.

It is an arithmetic number, because the mean of its divisors is an integer number (4448449320).

Almost surely, 2^66726739380 is an apocalyptic number.

66726739380 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66726739380 is an abundant number, since it is smaller than the sum of its proper divisors (146798827980).

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

66726739380 is a wasteful number, since it uses less digits than its factorization.

66726739380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158873208 (or 158873206 counting only the distinct ones).

The product of its (nonzero) digits is 13716864, while the sum is 57.

The spelling of 66726739380 in words is "sixty-six billion, seven hundred twenty-six million, seven hundred thirty-nine thousand, three hundred eighty".