696371661 has 12 divisors (see below), whose sum is σ = 1043124992. Its totient is φ = 464247612.

The previous prime is 696371659. The next prime is 696371677. The reversal of 696371661 is 166173696.

696371661 is a `hidden beast` number, since 6 + 9 + 637 + 1 + 6 + 6 + 1 = 666.

It is not a de Polignac number, because 696371661 - 2¹ = 696371659 is a prime.

It is a super-3 number, since 3×696371661³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (696371681) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1432621 + ... + 1433106.

Almost surely, 2^696371661 is an apocalyptic number.

It is an amenable number.

696371661 is a deficient number, since it is larger than the sum of its proper divisors (346753331).

696371661 is an equidigital number, since it uses as much as digits as its factorization.

696371661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2865742 (or 2865730 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 696371661 is about 26388.8548633699. The cubic root of 696371661 is about 886.3672402909.

The spelling of 696371661 in words is "six hundred ninety-six million, three hundred seventy-one thousand, six hundred sixty-one".