660368121 has 8 divisors (see below), whose sum is σ = 1006275264. Its totient is φ = 377353200.

The previous prime is 660368101. The next prime is 660368129. The reversal of 660368121 is 121863066.

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

It is not a de Polignac number, because 660368121 - 2⁶ = 660368057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (660368129) 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, 15723030 + ... + 15723071.

It is an arithmetic number, because the mean of its divisors is an integer number (125784408).

Almost surely, 2^660368121 is an apocalyptic number.

It is an amenable number.

660368121 is a deficient number, since it is larger than the sum of its proper divisors (345907143).

660368121 is a wasteful number, since it uses less digits than its factorization.

660368121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31446111.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 660368121 is about 25697.6287038318. The cubic root of 660368121 is about 870.8206116459.

The spelling of 660368121 in words is "six hundred sixty million, three hundred sixty-eight thousand, one hundred twenty-one".