666061121 has 8 divisors (see below), whose sum is σ = 730418688. Its totient is φ = 602338000.

The previous prime is 666061069. The next prime is 666061127. The reversal of 666061121 is 121160666.

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

It is not a de Polignac number, because 666061121 - 2⁶ = 666061057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666061127) 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, 156410 + ... + 160611.

It is an arithmetic number, because the mean of its divisors is an integer number (91302336).

Almost surely, 2^666061121 is an apocalyptic number.

It is an amenable number.

666061121 is a deficient number, since it is larger than the sum of its proper divisors (64357567).

666061121 is a wasteful number, since it uses less digits than its factorization.

666061121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317223.

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

The square root of 666061121 is about 25808.1599692810. The cubic root of 666061121 is about 873.3158881811.

The spelling of 666061121 in words is "six hundred sixty-six million, sixty-one thousand, one hundred twenty-one".