1660615313331 has 64 divisors (see below), whose sum is σ = 2505439641600. Its totient is φ = 970705342464.

The previous prime is 1660615313327. The next prime is 1660615313363. The reversal of 1660615313331 is 1333135160661.

It is not a de Polignac number, because 1660615313331 - 2² = 1660615313327 is a prime.

It is a super-2 number, since 2×1660615313331² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 1660615313331.

It is not an unprimeable number, because it can be changed into a prime (1660615313311) 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 63 ways as a sum of consecutive naturals, for example, 144157390 + ... + 144168908.

It is an arithmetic number, because the mean of its divisors is an integer number (39147494400).

Almost surely, 2^{1660615313331} is an apocalyptic number.

1660615313331 is a deficient number, since it is larger than the sum of its proper divisors (844824328269).

1660615313331 is a wasteful number, since it uses less digits than its factorization.

1660615313331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12660.

The product of its (nonzero) digits is 87480, while the sum is 39.

The spelling of 1660615313331 in words is "one trillion, six hundred sixty billion, six hundred fifteen million, three hundred thirteen thousand, three hundred thirty-one".