66141517 has 4 divisors (see below), whose sum is σ = 71229340. Its totient is φ = 61053696.

The previous prime is 66141511. The next prime is 66141521. The reversal of 66141517 is 71514166.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13883076 + 52258441 = 3726^2 + 7229^2 .

It is a cyclic number.

It is not a de Polignac number, because 66141517 - 2⁷ = 66141389 is a prime.

It is a super-2 number, since 2×66141517² = 8749400542122578, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66141511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2543892 + ... + 2543917.

It is an arithmetic number, because the mean of its divisors is an integer number (17807335).

Almost surely, 2^66141517 is an apocalyptic number.

It is an amenable number.

66141517 is a deficient number, since it is larger than the sum of its proper divisors (5087823).

66141517 is a wasteful number, since it uses less digits than its factorization.

66141517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5087822.

The product of its digits is 5040, while the sum is 31.

The square root of 66141517 is about 8132.7435100340. The cubic root of 66141517 is about 404.4126363510.

The spelling of 66141517 in words is "sixty-six million, one hundred forty-one thousand, five hundred seventeen".