66157201 has 8 divisors (see below), whose sum is σ = 72916704. Its totient is φ = 59521920.

The previous prime is 66157181. The next prime is 66157211. The reversal of 66157201 is 10275166.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66157201 - 2¹⁵ = 66124433 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66157201.

It is not an unprimeable number, because it can be changed into a prime (66157211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29935 + ... + 32068.

It is an arithmetic number, because the mean of its divisors is an integer number (9114588).

Almost surely, 2^66157201 is an apocalyptic number.

It is an amenable number.

66157201 is a deficient number, since it is larger than the sum of its proper divisors (6759503).

66157201 is a wasteful number, since it uses less digits than its factorization.

66157201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62111.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 66157201 is about 8133.7077031327. The cubic root of 66157201 is about 404.4445996664. Note that the first 3 decimals are identical.

The spelling of 66157201 in words is "sixty-six million, one hundred fifty-seven thousand, two hundred one".