1606177081 has 2 divisors, whose sum is σ = 1606177082. Its totient is φ = 1606177080.

The previous prime is 1606177049. The next prime is 1606177117. The reversal of 1606177081 is 1807716061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1481095225 + 125081856 = 38485^2 + 11184^2 .

It is a cyclic number.

It is not a de Polignac number, because 1606177081 - 2⁵ = 1606177049 is a prime.

It is a super-2 number, since 2×1606177081² = 5159609631059361122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1606177081.

It is not a weakly prime, because it can be changed into another prime (1606177381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 803088540 + 803088541.

It is an arithmetic number, because the mean of its divisors is an integer number (803088541).

Almost surely, 2^1606177081 is an apocalyptic number.

It is an amenable number.

1606177081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1606177081 is an equidigital number, since it uses as much as digits as its factorization.

1606177081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 37.

The square root of 1606177081 is about 40077.1391319291. The cubic root of 1606177081 is about 1171.1103203214.

The spelling of 1606177081 in words is "one billion, six hundred six million, one hundred seventy-seven thousand, eighty-one".