66149028993 has 8 divisors (see below), whose sum is σ = 88257944800. Its totient is φ = 44069732928.

The previous prime is 66149028983. The next prime is 66149029061. The reversal of 66149028993 is 39982094166.

It is a happy number.

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

It is not a de Polignac number, because 66149028993 - 2²² = 66144834689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66149028923) 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, 7399723 + ... + 7408656.

It is an arithmetic number, because the mean of its divisors is an integer number (11032243100).

Almost surely, 2^66149028993 is an apocalyptic number.

It is an amenable number.

66149028993 is a deficient number, since it is larger than the sum of its proper divisors (22108915807).

66149028993 is a wasteful number, since it uses less digits than its factorization.

66149028993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14809871.

The product of its (nonzero) digits is 5038848, while the sum is 57.

The spelling of 66149028993 in words is "sixty-six billion, one hundred forty-nine million, twenty-eight thousand, nine hundred ninety-three".