660789401471 has 4 divisors (see below), whose sum is σ = 689519375472. Its totient is φ = 632059427472.

The previous prime is 660789401443. The next prime is 660789401497. The reversal of 660789401471 is 174104987066.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 174104987066 = 2 ⋅87052493533.

It is a cyclic number.

It is not a de Polignac number, because 660789401471 - 2¹⁸ = 660789139327 is a prime.

It is a super-3 number, since 3×660789401471³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660789401411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14364986966 + ... + 14364987011.

It is an arithmetic number, because the mean of its divisors is an integer number (172379843868).

Almost surely, 2^660789401471 is an apocalyptic number.

660789401471 is a deficient number, since it is larger than the sum of its proper divisors (28729974001).

660789401471 is a wasteful number, since it uses less digits than its factorization.

660789401471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28729974000.

The product of its (nonzero) digits is 2032128, while the sum is 53.

The spelling of 660789401471 in words is "six hundred sixty billion, seven hundred eighty-nine million, four hundred one thousand, four hundred seventy-one".