1655661079 has 2 divisors, whose sum is σ = 1655661080. Its totient is φ = 1655661078.

The previous prime is 1655661067. The next prime is 1655661143. The reversal of 1655661079 is 9701665561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1655661079 - 2¹⁵ = 1655628311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1655661179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 827830539 + 827830540.

It is an arithmetic number, because the mean of its divisors is an integer number (827830540).

Almost surely, 2^1655661079 is an apocalyptic number.

1655661079 is a deficient number, since it is larger than the sum of its proper divisors (1).

1655661079 is an equidigital number, since it uses as much as digits as its factorization.

1655661079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 340200, while the sum is 46.

The square root of 1655661079 is about 40689.8154210608. The cubic root of 1655661079 is about 1183.0156226389.

The spelling of 1655661079 in words is "one billion, six hundred fifty-five million, six hundred sixty-one thousand, seventy-nine".