659951651 has 2 divisors, whose sum is σ = 659951652. Its totient is φ = 659951650.

The previous prime is 659951623. The next prime is 659951683. The reversal of 659951651 is 156159956.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 659951651 - 2⁶ = 659951587 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 659951596 and 659951605.

It is not a weakly prime, because it can be changed into another prime (659951051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 329975825 + 329975826.

It is an arithmetic number, because the mean of its divisors is an integer number (329975826).

Almost surely, 2^659951651 is an apocalyptic number.

659951651 is a deficient number, since it is larger than the sum of its proper divisors (1).

659951651 is an equidigital number, since it uses as much as digits as its factorization.

659951651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 364500, while the sum is 47.

The square root of 659951651 is about 25689.5241489600. The cubic root of 659951651 is about 870.6375082543.

The spelling of 659951651 in words is "six hundred fifty-nine million, nine hundred fifty-one thousand, six hundred fifty-one".