66701121 has 16 divisors (see below), whose sum is σ = 92845248. Its totient is φ = 42552000.

The previous prime is 66701111. The next prime is 66701147. The reversal of 66701121 is 12110766.

It is not a de Polignac number, because 66701121 - 2¹³ = 66692929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66701091 and 66701100.

It is not an unprimeable number, because it can be changed into a prime (66701101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1846 + ... + 11696.

It is an arithmetic number, because the mean of its divisors is an integer number (5802828).

Almost surely, 2^66701121 is an apocalyptic number.

66701121 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

66701121 is a deficient number, since it is larger than the sum of its proper divisors (26144127).

66701121 is a wasteful number, since it uses less digits than its factorization.

66701121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9952.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 66701121 is about 8167.0754251445. The cubic root of 66701121 is about 405.5499737464.

Adding to 66701121 its reverse (12110766), we get a palindrome (78811887).

The spelling of 66701121 in words is "sixty-six million, seven hundred one thousand, one hundred twenty-one".