66914121 has 4 divisors (see below), whose sum is σ = 89218832. Its totient is φ = 44609412.

The previous prime is 66914101. The next prime is 66914123. The reversal of 66914121 is 12141966.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 66914121 - 2⁷ = 66913993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66914123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11152351 + ... + 11152356.

It is an arithmetic number, because the mean of its divisors is an integer number (22304708).

Almost surely, 2^66914121 is an apocalyptic number.

It is an amenable number.

66914121 is a deficient number, since it is larger than the sum of its proper divisors (22304711).

66914121 is a wasteful number, since it uses less digits than its factorization.

66914121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22304710.

The product of its digits is 2592, while the sum is 30.

The square root of 66914121 is about 8180.1051949226. The cubic root of 66914121 is about 405.9812026694.

The spelling of 66914121 in words is "sixty-six million, nine hundred fourteen thousand, one hundred twenty-one".