65663651634 has 32 divisors (see below), whose sum is σ = 152328477696. Its totient is φ = 18481026960.

The previous prime is 65663651633. The next prime is 65663651657. The reversal of 65663651634 is 43615636656.

It is a super-2 number, since 2×65663651634² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65663651633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11664502 + ... + 11670129.

It is an arithmetic number, because the mean of its divisors is an integer number (4760264928).

Almost surely, 2^65663651634 is an apocalyptic number.

65663651634 is an abundant number, since it is smaller than the sum of its proper divisors (86664826062).

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

65663651634 is a wasteful number, since it uses less digits than its factorization.

65663651634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23334710.

The product of its digits is 6998400, while the sum is 51.

The spelling of 65663651634 in words is "sixty-five billion, six hundred sixty-three million, six hundred fifty-one thousand, six hundred thirty-four".