66274650321 has 32 divisors (see below), whose sum is σ = 99406614528. Its totient is φ = 38930087040.

The previous prime is 66274650317. The next prime is 66274650341. The reversal of 66274650321 is 12305647266.

It is not a de Polignac number, because 66274650321 - 2² = 66274650317 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66274650311) 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, 47676 + ... + 367181.

It is an arithmetic number, because the mean of its divisors is an integer number (3106456704).

Almost surely, 2^66274650321 is an apocalyptic number.

It is an amenable number.

66274650321 is a deficient number, since it is larger than the sum of its proper divisors (33131964207).

66274650321 is a wasteful number, since it uses less digits than its factorization.

66274650321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415021.

The product of its (nonzero) digits is 362880, while the sum is 42.

The spelling of 66274650321 in words is "sixty-six billion, two hundred seventy-four million, six hundred fifty thousand, three hundred twenty-one".