65642013667 has 4 divisors (see below), whose sum is σ = 65646706720. Its totient is φ = 65637320616.

The previous prime is 65642013631. The next prime is 65642013673. The reversal of 65642013667 is 76631024656.

65642013667 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 65642013667 - 2¹¹ = 65642011619 is a prime.

It is a super-2 number, since 2×65642013667² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65642013607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2325483 + ... + 2353540.

It is an arithmetic number, because the mean of its divisors is an integer number (16411676680).

Almost surely, 2^65642013667 is an apocalyptic number.

65642013667 is a deficient number, since it is larger than the sum of its proper divisors (4693053).

65642013667 is a wasteful number, since it uses less digits than its factorization.

65642013667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4693052.

The product of its (nonzero) digits is 1088640, while the sum is 46.

The spelling of 65642013667 in words is "sixty-five billion, six hundred forty-two million, thirteen thousand, six hundred sixty-seven".