79066649 has 2 divisors, whose sum is σ = 79066650. Its totient is φ = 79066648.

The previous prime is 79066639. The next prime is 79066661. The reversal of 79066649 is 94666097.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47706649 + 31360000 = 6907^2 + 5600^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79066649 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (79066639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39533324 + 39533325.

It is an arithmetic number, because the mean of its divisors is an integer number (39533325).

Almost surely, 2^79066649 is an apocalyptic number.

It is an amenable number.

79066649 is a deficient number, since it is larger than the sum of its proper divisors (1).

79066649 is an equidigital number, since it uses as much as digits as its factorization.

79066649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 489888, while the sum is 47.

The square root of 79066649 is about 8891.9429260427. The cubic root of 79066649 is about 429.2046755457.

The spelling of 79066649 in words is "seventy-nine million, sixty-six thousand, six hundred forty-nine".