66901129448 has 8 divisors (see below), whose sum is σ = 125439617730. Its totient is φ = 33450564720.

The previous prime is 66901129441. The next prime is 66901129453. The reversal of 66901129448 is 84492110966.

It can be written as a sum of positive squares in only one way, i.e., 61743304324 + 5157825124 = 248482^2 + 71818^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×66901129448² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66901129396 and 66901129405.

It is not an unprimeable number, because it can be changed into a prime (66901129441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4181320583 + ... + 4181320598.

Almost surely, 2^66901129448 is an apocalyptic number.

It is an amenable number.

66901129448 is a deficient number, since it is larger than the sum of its proper divisors (58538488282).

66901129448 is a wasteful number, since it uses less digits than its factorization.

66901129448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8362641187 (or 8362641183 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 50.

The spelling of 66901129448 in words is "sixty-six billion, nine hundred one million, one hundred twenty-nine thousand, four hundred forty-eight".