79150661 has 2 divisors, whose sum is σ = 79150662. Its totient is φ = 79150660.

The previous prime is 79150627. The next prime is 79150663. The reversal of 79150661 is 16605197.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60062500 + 19088161 = 7750^2 + 4369^2 .

It is a cyclic number.

It is not a de Polignac number, because 79150661 - 2⁶ = 79150597 is a prime.

Together with 79150663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79150663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39575330 + 39575331.

It is an arithmetic number, because the mean of its divisors is an integer number (39575331).

Almost surely, 2^79150661 is an apocalyptic number.

It is an amenable number.

79150661 is a deficient number, since it is larger than the sum of its proper divisors (1).

79150661 is an equidigital number, since it uses as much as digits as its factorization.

79150661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 79150661 is about 8896.6657237417. The cubic root of 79150661 is about 429.3566383938.

The spelling of 79150661 in words is "seventy-nine million, one hundred fifty thousand, six hundred sixty-one".