662980517 has 2 divisors, whose sum is σ = 662980518. Its totient is φ = 662980516.

The previous prime is 662980499. The next prime is 662980519. The reversal of 662980517 is 715089266.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 613503361 + 49477156 = 24769^2 + 7034^2 .

It is a cyclic number.

It is not a de Polignac number, because 662980517 - 2²² = 658786213 is a prime.

Together with 662980519, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (662980519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331490258 + 331490259.

It is an arithmetic number, because the mean of its divisors is an integer number (331490259).

Almost surely, 2^662980517 is an apocalyptic number.

It is an amenable number.

662980517 is a deficient number, since it is larger than the sum of its proper divisors (1).

662980517 is an equidigital number, since it uses as much as digits as its factorization.

662980517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 662980517 is about 25748.4080478774. The cubic root of 662980517 is about 871.9674139304.

The spelling of 662980517 in words is "six hundred sixty-two million, nine hundred eighty thousand, five hundred seventeen".