660172153930 has 16 divisors (see below), whose sum is σ = 1188478725984. Its totient is φ = 264031339600.

The previous prime is 660172153913. The next prime is 660172153931. The reversal of 660172153930 is 39351271066.

It is a super-2 number, since 2×660172153930² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (660172153931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4616296 + ... + 4757155.

It is an arithmetic number, because the mean of its divisors is an integer number (74279920374).

Almost surely, 2^660172153930 is an apocalyptic number.

660172153930 is a deficient number, since it is larger than the sum of its proper divisors (528306572054).

660172153930 is a wasteful number, since it uses less digits than its factorization.

660172153930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9380501.

The product of its (nonzero) digits is 204120, while the sum is 43.

The spelling of 660172153930 in words is "six hundred sixty billion, one hundred seventy-two million, one hundred fifty-three thousand, nine hundred thirty".