660601545121 has 16 divisors (see below), whose sum is σ = 758236032000. Its totient is φ = 563788044288.

The previous prime is 660601545113. The next prime is 660601545127. The reversal of 660601545121 is 121545106066.

It is not a de Polignac number, because 660601545121 - 2³ = 660601545113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660601545127) 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, 1286101 + ... + 1724893.

It is an arithmetic number, because the mean of its divisors is an integer number (47389752000).

Almost surely, 2^660601545121 is an apocalyptic number.

It is an amenable number.

660601545121 is a deficient number, since it is larger than the sum of its proper divisors (97634486879).

660601545121 is a wasteful number, since it uses less digits than its factorization.

660601545121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439728.

The product of its (nonzero) digits is 43200, while the sum is 37.

The spelling of 660601545121 in words is "six hundred sixty billion, six hundred one million, five hundred forty-five thousand, one hundred twenty-one".