66847668441 has 32 divisors (see below), whose sum is σ = 98549114880. Its totient is φ = 40116384000.

The previous prime is 66847668409. The next prime is 66847668473. The reversal of 66847668441 is 14486674866.

It is an interprime number because it is at equal distance from previous prime (66847668409) and next prime (66847668473).

It is not a de Polignac number, because 66847668441 - 2⁵ = 66847668409 is a prime.

It is a super-2 number, since 2×66847668441² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66847668941) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29121 + ... + 366801.

It is an arithmetic number, because the mean of its divisors is an integer number (3079659840).

Almost surely, 2^66847668441 is an apocalyptic number.

It is an amenable number.

66847668441 is a deficient number, since it is larger than the sum of its proper divisors (31701446439).

66847668441 is a wasteful number, since it uses less digits than its factorization.

66847668441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337877.

The product of its digits is 37158912, while the sum is 60.

The spelling of 66847668441 in words is "sixty-six billion, eight hundred forty-seven million, six hundred sixty-eight thousand, four hundred forty-one".