693666506 has 16 divisors (see below), whose sum is σ = 1127682024. Its totient is φ = 318112704.

The previous prime is 693666473. The next prime is 693666539. The reversal of 693666506 is 605666396.

It is an interprime number because it is at equal distance from previous prime (693666473) and next prime (693666539).

It can be written as a sum of positive squares in 4 ways, for example, as 437186281 + 256480225 = 20909^2 + 16015^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80885 + ... + 89048.

Almost surely, 2^693666506 is an apocalyptic number.

693666506 is a deficient number, since it is larger than the sum of its proper divisors (434015518).

693666506 is a wasteful number, since it uses less digits than its factorization.

693666506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170105.

The product of its (nonzero) digits is 1049760, while the sum is 47.

The square root of 693666506 is about 26337.5493544863. The cubic root of 693666506 is about 885.2180109167.

The spelling of 693666506 in words is "six hundred ninety-three million, six hundred sixty-six thousand, five hundred six".