65689554 has 16 divisors (see below), whose sum is σ = 150147648. Its totient is φ = 18768432.

The previous prime is 65689549. The next prime is 65689567. The reversal of 65689554 is 45598656.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 781977 + ... + 782060.

It is an arithmetic number, because the mean of its divisors is an integer number (9384228).

Almost surely, 2^65689554 is an apocalyptic number.

65689554 is an abundant number, since it is smaller than the sum of its proper divisors (84458094).

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

65689554 is a wasteful number, since it uses less digits than its factorization.

65689554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1564049.

The product of its digits is 1296000, while the sum is 48.

The square root of 65689554 is about 8104.9092530392. The cubic root of 65689554 is about 403.4893762875.

The spelling of 65689554 in words is "sixty-five million, six hundred eighty-nine thousand, five hundred fifty-four".