66051641 has 8 divisors (see below), whose sum is σ = 67477344. Its totient is φ = 64640160.

The previous prime is 66051637. The next prime is 66051659. The reversal of 66051641 is 14615066.

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 66051641 - 2² = 66051637 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66051611) by changing a digit.

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, 6110 + ... + 13016.

It is an arithmetic number, because the mean of its divisors is an integer number (8434668).

Almost surely, 2^66051641 is an apocalyptic number.

It is an amenable number.

66051641 is a deficient number, since it is larger than the sum of its proper divisors (1425703).

66051641 is a wasteful number, since it uses less digits than its factorization.

66051641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7111.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 66051641 is about 8127.2160670183. The cubic root of 66051641 is about 404.2293754307.

The spelling of 66051641 in words is "sixty-six million, fifty-one thousand, six hundred forty-one".