65700020 has 24 divisors (see below), whose sum is σ = 138142368. Its totient is φ = 26247200.

The previous prime is 65700017. The next prime is 65700023. The reversal of 65700020 is 2000756.

It is an interprime number because it is at equal distance from previous prime (65700017) and next prime (65700023).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 65699965 and 65700001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65700023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20315 + ... + 23325.

It is an arithmetic number, because the mean of its divisors is an integer number (5755932).

Almost surely, 2^65700020 is an apocalyptic number.

It is an amenable number.

65700020 is an abundant number, since it is smaller than the sum of its proper divisors (72442348).

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

65700020 is a wasteful number, since it uses less digits than its factorization.

65700020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4111 (or 4109 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 65700020 is about 8105.5548853857. The cubic root of 65700020 is about 403.5108038220.

Adding to 65700020 its reverse (2000756), we get a palindrome (67700776).

The spelling of 65700020 in words is "sixty-five million, seven hundred thousand, twenty".