66126949321 has 8 divisors (see below), whose sum is σ = 66616977600. Its totient is φ = 65637537648.

The previous prime is 66126949279. The next prime is 66126949349. The reversal of 66126949321 is 12394962166.

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 66126949321 - 2¹³ = 66126941129 is a prime.

It is a super-2 number, since 2×66126949321² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66126949391) 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, 62250 + ... + 368956.

It is an arithmetic number, because the mean of its divisors is an integer number (8327122200).

Almost surely, 2^66126949321 is an apocalyptic number.

It is an amenable number.

66126949321 is a deficient number, since it is larger than the sum of its proper divisors (490028279).

66126949321 is a wasteful number, since it uses less digits than its factorization.

66126949321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308303.

The product of its digits is 839808, while the sum is 49.

The spelling of 66126949321 in words is "sixty-six billion, one hundred twenty-six million, nine hundred forty-nine thousand, three hundred twenty-one".