65720990162 has 4 divisors (see below), whose sum is σ = 98581485246. Its totient is φ = 32860495080.

The previous prime is 65720990161. The next prime is 65720990207. The reversal of 65720990162 is 26109902756.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 54582509641 + 11138480521 = 233629^2 + 105539^2 .

It is not an unprimeable number, because it can be changed into a prime (65720990161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16430247539 + ... + 16430247542.

Almost surely, 2^65720990162 is an apocalyptic number.

65720990162 is a deficient number, since it is larger than the sum of its proper divisors (32860495084).

65720990162 is a wasteful number, since it uses less digits than its factorization.

65720990162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32860495083.

The product of its (nonzero) digits is 408240, while the sum is 47.

The spelling of 65720990162 in words is "sixty-five billion, seven hundred twenty million, nine hundred ninety thousand, one hundred sixty-two".