66201516 has 24 divisors (see below), whose sum is σ = 171633840. Its totient is φ = 22067136.

The previous prime is 66201479. The next prime is 66201557. The reversal of 66201516 is 61510266.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 66201516.

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, 306381 + ... + 306596.

It is an arithmetic number, because the mean of its divisors is an integer number (7151410).

Almost surely, 2^66201516 is an apocalyptic number.

It is an amenable number.

66201516 is an abundant number, since it is smaller than the sum of its proper divisors (105432324).

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

66201516 is a wasteful number, since it uses less digits than its factorization.

66201516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612990 (or 612982 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 66201516 is about 8136.4314044918. The cubic root of 66201516 is about 404.5348844315.

The spelling of 66201516 in words is "sixty-six million, two hundred one thousand, five hundred sixteen".