66279541 has 4 divisors (see below), whose sum is σ = 67689792. Its totient is φ = 64869292.

The previous prime is 66279539. The next prime is 66279553. The reversal of 66279541 is 14597266.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66279541 - 2¹ = 66279539 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66279494 and 66279503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66279511) 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, 705055 + ... + 705148.

It is an arithmetic number, because the mean of its divisors is an integer number (16922448).

Almost surely, 2^66279541 is an apocalyptic number.

It is an amenable number.

66279541 is a deficient number, since it is larger than the sum of its proper divisors (1410251).

66279541 is a wasteful number, since it uses less digits than its factorization.

66279541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1410250.

The product of its digits is 90720, while the sum is 40.

The square root of 66279541 is about 8141.2247850062. The cubic root of 66279541 is about 404.6937500891.

The spelling of 66279541 in words is "sixty-six million, two hundred seventy-nine thousand, five hundred forty-one".