66747922869 has 16 divisors (see below), whose sum is σ = 93018229632. Its totient is φ = 42494430528.

The previous prime is 66747922859. The next prime is 66747922883. The reversal of 66747922869 is 96822974766.

It is not a de Polignac number, because 66747922869 - 2⁴ = 66747922853 is a prime.

It is a super-2 number, since 2×66747922869² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66747922859) 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, 746742 + ... + 831335.

It is an arithmetic number, because the mean of its divisors is an integer number (5813639352).

Almost surely, 2^66747922869 is an apocalyptic number.

66747922869 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

It is an amenable number.

66747922869 is a deficient number, since it is larger than the sum of its proper divisors (26270306763).

66747922869 is a wasteful number, since it uses less digits than its factorization.

66747922869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1578716.

The product of its digits is 109734912, while the sum is 66.

The spelling of 66747922869 in words is "sixty-six billion, seven hundred forty-seven million, nine hundred twenty-two thousand, eight hundred sixty-nine".