1680201077 has 2 divisors, whose sum is σ = 1680201078. Its totient is φ = 1680201076.

The previous prime is 1680201059. The next prime is 1680201113. The reversal of 1680201077 is 7701020861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1266932836 + 413268241 = 35594^2 + 20329^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1680201077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1680201577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840100538 + 840100539.

It is an arithmetic number, because the mean of its divisors is an integer number (840100539).

Almost surely, 2^1680201077 is an apocalyptic number.

It is an amenable number.

1680201077 is a deficient number, since it is larger than the sum of its proper divisors (1).

1680201077 is an equidigital number, since it uses as much as digits as its factorization.

1680201077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704, while the sum is 32.

The square root of 1680201077 is about 40990.2558786841. The cubic root of 1680201077 is about 1188.8318166762.

The spelling of 1680201077 in words is "one billion, six hundred eighty million, two hundred one thousand, seventy-seven".