66146104391 has 8 divisors (see below), whose sum is σ = 66439712160. Its totient is φ = 65853021312.

The previous prime is 66146104373. The next prime is 66146104429. The reversal of 66146104391 is 19340164166.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66146104391 - 2⁶ = 66146104327 is a prime.

It is a super-2 number, since 2×66146104391² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66146104301) 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, 122606 + ... + 383828.

It is an arithmetic number, because the mean of its divisors is an integer number (8304964020).

Almost surely, 2^66146104391 is an apocalyptic number.

66146104391 is a deficient number, since it is larger than the sum of its proper divisors (293607769).

66146104391 is a wasteful number, since it uses less digits than its factorization.

66146104391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262345.

The product of its (nonzero) digits is 93312, while the sum is 41.

The spelling of 66146104391 in words is "sixty-six billion, one hundred forty-six million, one hundred four thousand, three hundred ninety-one".