660615025121 has 8 divisors (see below), whose sum is σ = 663968894400. Its totient is φ = 657266886000.

The previous prime is 660615025111. The next prime is 660615025127. The reversal of 660615025121 is 121520516066.

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

It is a cyclic number.

It is not a de Polignac number, because 660615025121 - 2¹⁴ = 660615008737 is a prime.

It is a super-2 number, since 2×660615025121² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (660615025127) 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, 1201286 + ... + 1662623.

It is an arithmetic number, because the mean of its divisors is an integer number (82996111800).

Almost surely, 2^660615025121 is an apocalyptic number.

It is an amenable number.

660615025121 is a deficient number, since it is larger than the sum of its proper divisors (3353869279).

660615025121 is a wasteful number, since it uses less digits than its factorization.

660615025121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2865079.

The product of its (nonzero) digits is 21600, while the sum is 35.

The spelling of 660615025121 in words is "six hundred sixty billion, six hundred fifteen million, twenty-five thousand, one hundred twenty-one".