65700066 has 16 divisors (see below), whose sum is σ = 133362144. Its totient is φ = 21573024.

The previous prime is 65700059. The next prime is 65700071. The reversal of 65700066 is 66000756.

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, 81315 + ... + 82118.

It is an arithmetic number, because the mean of its divisors is an integer number (8335134).

Almost surely, 2^65700066 is an apocalyptic number.

65700066 is an abundant number, since it is smaller than the sum of its proper divisors (67662078).

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

65700066 is a wasteful number, since it uses less digits than its factorization.

65700066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163505.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 65700066 is about 8105.5577229454. The cubic root of 65700066 is about 403.5108979949.

The spelling of 65700066 in words is "sixty-five million, seven hundred thousand, sixty-six".