627385427815661 has 8 divisors (see below), whose sum is σ = 632938271709624. Its totient is φ = 621832597263360.

The previous prime is 627385427815609. The next prime is 627385427815697. The reversal of 627385427815661 is 166518724583726.

It can be written as a sum of positive squares in 4 ways, for example, as 23281290854761 + 604104136960900 = 4825069^2 + 24578530^2 .

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 627385427815661 - 2³⁰ = 627384354073837 is a prime.

It is a super-2 number, since 2×627385427815661² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (627385427815361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107297291 + ... + 112993271.

It is an arithmetic number, because the mean of its divisors is an integer number (79117283963703).

Almost surely, 2^{627385427815661} is an apocalyptic number.

It is an amenable number.

627385427815661 is a deficient number, since it is larger than the sum of its proper divisors (5552843893963).

627385427815661 is a wasteful number, since it uses less digits than its factorization.

627385427815661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6670831.

The product of its digits is 812851200, while the sum is 71.

The spelling of 627385427815661 in words is "six hundred twenty-seven trillion, three hundred eighty-five billion, four hundred twenty-seven million, eight hundred fifteen thousand, six hundred sixty-one".