66928041 has 12 divisors (see below), whose sum is σ = 98259460. Its totient is φ = 43886880.

The previous prime is 66928019. The next prime is 66928049. The reversal of 66928041 is 14082966.

It can be written as a sum of positive squares in 2 ways, for example, as 14220441 + 52707600 = 3771^2 + 7260^2 .

It is not a de Polignac number, because 66928041 - 2⁵ = 66928009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66927987 and 66928005.

It is not an unprimeable number, because it can be changed into a prime (66928049) 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, 60406 + ... + 61503.

Almost surely, 2^66928041 is an apocalyptic number.

66928041 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

66928041 is a deficient number, since it is larger than the sum of its proper divisors (31331419).

66928041 is a wasteful number, since it uses less digits than its factorization.

66928041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121976 (or 121973 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 66928041 is about 8180.9559954812. The cubic root of 66928041 is about 406.0093525149.

The spelling of 66928041 in words is "sixty-six million, nine hundred twenty-eight thousand, forty-one".