66279081 has 12 divisors (see below), whose sum is σ = 97136816. Its totient is φ = 40168920.

The previous prime is 66279079. The next prime is 66279119. The reversal of 66279081 is 18097266.

It is not a de Polignac number, because 66279081 - 2¹ = 66279079 is a prime.

It is a super-2 number, since 2×66279081² = 8785833156409122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66279041) 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, 90931 + ... + 91656.

Almost surely, 2^66279081 is an apocalyptic number.

It is an amenable number.

66279081 is a deficient number, since it is larger than the sum of its proper divisors (30857735).

66279081 is a wasteful number, since it uses less digits than its factorization.

66279081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182612 (or 182601 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 66279081 is about 8141.1965336798. The cubic root of 66279081 is about 404.6928138547.

The spelling of 66279081 in words is "sixty-six million, two hundred seventy-nine thousand, eighty-one".