66376641 has 8 divisors (see below), whose sum is σ = 88593120. Its totient is φ = 44205632.

The previous prime is 66376627. The next prime is 66376657. The reversal of 66376641 is 14667366.

It is a happy number.

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 66376641 - 2¹⁵ = 66343873 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66376641.

It is not an unprimeable number, because it can be changed into a prime (66376691) 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, 7800 + ... + 13913.

It is an arithmetic number, because the mean of its divisors is an integer number (11074140).

Almost surely, 2^66376641 is an apocalyptic number.

It is an amenable number.

66376641 is a deficient number, since it is larger than the sum of its proper divisors (22216479).

66376641 is a wasteful number, since it uses less digits than its factorization.

66376641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22735.

The product of its digits is 108864, while the sum is 39.

The square root of 66376641 is about 8147.1860786409. The cubic root of 66376641 is about 404.8912800690.

The spelling of 66376641 in words is "sixty-six million, three hundred seventy-six thousand, six hundred forty-one".