65697730 has 24 divisors (see below), whose sum is σ = 137564028. Its totient is φ = 22524768.

The previous prime is 65697719. The next prime is 65697733. The reversal of 65697730 is 3779656.

It can be written as a sum of positive squares in 2 ways, for example, as 60264169 + 5433561 = 7763^2 + 2331^2 .

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (65697733) 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, 66549 + ... + 67528.

Almost surely, 2^65697730 is an apocalyptic number.

65697730 is an abundant number, since it is smaller than the sum of its proper divisors (71866298).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65697730 is a wasteful number, since it uses less digits than its factorization.

65697730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134098 (or 134091 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 43.

The square root of 65697730 is about 8105.4136230053. The cubic root of 65697730 is about 403.5061155917.

The spelling of 65697730 in words is "sixty-five million, six hundred ninety-seven thousand, seven hundred thirty".