662502661 has 2 divisors, whose sum is σ = 662502662. Its totient is φ = 662502660.

The previous prime is 662502629. The next prime is 662502691. The reversal of 662502661 is 166205266.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 467900161 + 194602500 = 21631^2 + 13950^2 .

It is a cyclic number.

It is not a de Polignac number, because 662502661 - 2⁵ = 662502629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (662502601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331251330 + 331251331.

It is an arithmetic number, because the mean of its divisors is an integer number (331251331).

Almost surely, 2^662502661 is an apocalyptic number.

It is an amenable number.

662502661 is a deficient number, since it is larger than the sum of its proper divisors (1).

662502661 is an equidigital number, since it uses as much as digits as its factorization.

662502661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 662502661 is about 25739.1270442492. The cubic root of 662502661 is about 871.7578677981.

The spelling of 662502661 in words is "six hundred sixty-two million, five hundred two thousand, six hundred sixty-one".