165664362651 has 8 divisors (see below), whose sum is σ = 226273275984. Its totient is φ = 107749178880.

The previous prime is 165664362593. The next prime is 165664362673. The reversal of 165664362651 is 156263466561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 165664362651 - 2⁶ = 165664362587 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 165664362594 and 165664362603.

It is not an unprimeable number, because it can be changed into a prime (165664364651) 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, 673432246 + ... + 673432491.

It is an arithmetic number, because the mean of its divisors is an integer number (28284159498).

Almost surely, 2^165664362651 is an apocalyptic number.

165664362651 is a deficient number, since it is larger than the sum of its proper divisors (60608913333).

165664362651 is a wasteful number, since it uses less digits than its factorization.

165664362651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1346864781.

The product of its digits is 4665600, while the sum is 51.

The spelling of 165664362651 in words is "one hundred sixty-five billion, six hundred sixty-four million, three hundred sixty-two thousand, six hundred fifty-one".