660311546401 has 8 divisors (see below), whose sum is σ = 735625595880. Its totient is φ = 588500476032.

The previous prime is 660311546399. The next prime is 660311546423. The reversal of 660311546401 is 104645113066.

It can be written as a sum of positive squares in 4 ways, for example, as 200117549025 + 460193997376 = 447345^2 + 678376^2 .

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 660311546401 - 2¹ = 660311546399 is a prime.

It is a super-2 number, since 2×660311546401² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660311543401) 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, 875744380 + ... + 875745133.

It is an arithmetic number, because the mean of its divisors is an integer number (91953199485).

Almost surely, 2^660311546401 is an apocalyptic number.

It is an amenable number.

660311546401 is a deficient number, since it is larger than the sum of its proper divisors (75314049479).

660311546401 is a wasteful number, since it uses less digits than its factorization.

660311546401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1751489555.

The product of its (nonzero) digits is 51840, while the sum is 37.

Adding to 660311546401 its reverse (104645113066), we get a palindrome (764956659467).

The spelling of 660311546401 in words is "six hundred sixty billion, three hundred eleven million, five hundred forty-six thousand, four hundred one".