1660157553619 has 2 divisors, whose sum is σ = 1660157553620. Its totient is φ = 1660157553618.

The previous prime is 1660157553569. The next prime is 1660157553647. The reversal of 1660157553619 is 9163557510661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1660157553619 - 2²³ = 1660149165011 is a prime.

It is a super-2 number, since 2×1660157553619² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1660157553619.

It is not a weakly prime, because it can be changed into another prime (1660157553319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 830078776809 + 830078776810.

It is an arithmetic number, because the mean of its divisors is an integer number (830078776810).

Almost surely, 2^{1660157553619} is an apocalyptic number.

1660157553619 is a deficient number, since it is larger than the sum of its proper divisors (1).

1660157553619 is an equidigital number, since it uses as much as digits as its factorization.

1660157553619 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5103000, while the sum is 55.

The spelling of 1660157553619 in words is "one trillion, six hundred sixty billion, one hundred fifty-seven million, five hundred fifty-three thousand, six hundred nineteen".