79666069 has 16 divisors (see below), whose sum is σ = 98435200. Its totient is φ = 62938944.

The previous prime is 79666051. The next prime is 79666091. The reversal of 79666069 is 96066697.

It is not a de Polignac number, because 79666069 - 2⁷ = 79665941 is a prime.

It is a super-2 number, since 2×79666069² = 12693365099825522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79666009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3174 + ... + 13015.

It is an arithmetic number, because the mean of its divisors is an integer number (6152200).

Almost surely, 2^79666069 is an apocalyptic number.

It is an amenable number.

79666069 is a deficient number, since it is larger than the sum of its proper divisors (18769131).

79666069 is a wasteful number, since it uses less digits than its factorization.

79666069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16252.

The product of its (nonzero) digits is 734832, while the sum is 49.

The square root of 79666069 is about 8925.5850788618. The cubic root of 79666069 is about 430.2865747883.

The spelling of 79666069 in words is "seventy-nine million, six hundred sixty-six thousand, sixty-nine".