351666551 has 2 divisors, whose sum is σ = 351666552. Its totient is φ = 351666550.

The previous prime is 351666493. The next prime is 351666559. The reversal of 351666551 is 155666153.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 351666551 - 2¹⁰ = 351665527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (351666559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 175833275 + 175833276.

It is an arithmetic number, because the mean of its divisors is an integer number (175833276).

Almost surely, 2^351666551 is an apocalyptic number.

351666551 is a deficient number, since it is larger than the sum of its proper divisors (1).

351666551 is an equidigital number, since it uses as much as digits as its factorization.

351666551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81000, while the sum is 38.

The square root of 351666551 is about 18752.7744880591. The cubic root of 351666551 is about 705.8466437632.

The spelling of 351666551 in words is "three hundred fifty-one million, six hundred sixty-six thousand, five hundred fifty-one".