80777651 has 2 divisors, whose sum is σ = 80777652. Its totient is φ = 80777650.

The previous prime is 80777629. The next prime is 80777687. The reversal of 80777651 is 15677708.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80777651 - 2¹⁸ = 80515507 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 80777599 and 80777608.

It is not a weakly prime, because it can be changed into another prime (80779651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40388825 + 40388826.

It is an arithmetic number, because the mean of its divisors is an integer number (40388826).

Almost surely, 2^80777651 is an apocalyptic number.

80777651 is a deficient number, since it is larger than the sum of its proper divisors (1).

80777651 is an equidigital number, since it uses as much as digits as its factorization.

80777651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82320, while the sum is 41.

The square root of 80777651 is about 8987.6387889145. The cubic root of 80777651 is about 432.2786036502.

The spelling of 80777651 in words is "eighty million, seven hundred seventy-seven thousand, six hundred fifty-one".