66921122 has 8 divisors (see below), whose sum is σ = 104746176. Its totient is φ = 32005732.

The previous prime is 66921103. The next prime is 66921131. The reversal of 66921122 is 22112966.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 727358 + ... + 727449.

It is an arithmetic number, because the mean of its divisors is an integer number (13093272).

Almost surely, 2^66921122 is an apocalyptic number.

66921122 is a deficient number, since it is larger than the sum of its proper divisors (37825054).

66921122 is a wasteful number, since it uses less digits than its factorization.

66921122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1454832.

The product of its digits is 2592, while the sum is 29.

The square root of 66921122 is about 8180.5331122122. The cubic root of 66921122 is about 405.9953609927.

The spelling of 66921122 in words is "sixty-six million, nine hundred twenty-one thousand, one hundred twenty-two".