661023145121314 has 16 divisors (see below), whose sum is σ = 993144492584568. Its totient is φ = 329974983893632.

The previous prime is 661023145121239. The next prime is 661023145121357. The reversal of 661023145121314 is 413121541320166.

It can be written as a sum of positive squares in 4 ways, for example, as 302048167298089 + 358974977823225 = 17379533^2 + 18946635^2 .

It is a super-3 number, since 3×661023145121314³ (a number of 45 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 767903892 + ... + 768764224.

Almost surely, 2^{661023145121314} is an apocalyptic number.

661023145121314 is a deficient number, since it is larger than the sum of its proper divisors (332121347463254).

661023145121314 is a wasteful number, since it uses less digits than its factorization.

661023145121314 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1483589.

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 661023145121314 in words is "six hundred sixty-one trillion, twenty-three billion, one hundred forty-five million, one hundred twenty-one thousand, three hundred fourteen".