656142671 has 2 divisors, whose sum is σ = 656142672. Its totient is φ = 656142670.

The previous prime is 656142611. The next prime is 656142677. The reversal of 656142671 is 176241656.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 656142671 - 2¹⁸ = 655880527 is a prime.

It is a super-3 number, since 3×656142671³ (a number of 27 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (656142677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328071335 + 328071336.

It is an arithmetic number, because the mean of its divisors is an integer number (328071336).

Almost surely, 2^656142671 is an apocalyptic number.

656142671 is a deficient number, since it is larger than the sum of its proper divisors (1).

656142671 is an equidigital number, since it uses as much as digits as its factorization.

656142671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 38.

The square root of 656142671 is about 25615.2819816609. The cubic root of 656142671 is about 868.9592835956.

The spelling of 656142671 in words is "six hundred fifty-six million, one hundred forty-two thousand, six hundred seventy-one".