66051559 has 12 divisors (see below), whose sum is σ = 77065824. Its totient is φ = 56445984.

The previous prime is 66051547. The next prime is 66051571. The reversal of 66051559 is 95515066.

It is an interprime number because it is at equal distance from previous prime (66051547) and next prime (66051571).

It is not a de Polignac number, because 66051559 - 2⁵ = 66051527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66051529) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16147 + ... + 19819.

It is an arithmetic number, because the mean of its divisors is an integer number (6422152).

Almost surely, 2^66051559 is an apocalyptic number.

66051559 is a deficient number, since it is larger than the sum of its proper divisors (11014265).

66051559 is a wasteful number, since it uses less digits than its factorization.

66051559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4054 (or 4047 counting only the distinct ones).

The product of its (nonzero) digits is 40500, while the sum is 37.

The square root of 66051559 is about 8127.2110222388. The cubic root of 66051559 is about 404.2292081533.

The spelling of 66051559 in words is "sixty-six million, fifty-one thousand, five hundred fifty-nine".