65542201566 has 16 divisors (see below), whose sum is σ = 131091811344. Its totient is φ = 21846165824.

The previous prime is 65542201547. The next prime is 65542201573. The reversal of 65542201566 is 66510224556.

It is a happy number.

It is a super-2 number, since 2×65542201566² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190161 + ... + 408956.

It is an arithmetic number, because the mean of its divisors is an integer number (8193238209).

Almost surely, 2^65542201566 is an apocalyptic number.

65542201566 is an abundant number, since it is smaller than the sum of its proper divisors (65549609778).

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

65542201566 is a wasteful number, since it uses less digits than its factorization.

65542201566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617355.

The product of its (nonzero) digits is 432000, while the sum is 42.

The spelling of 65542201566 in words is "sixty-five billion, five hundred forty-two million, two hundred one thousand, five hundred sixty-six".