1660157553598 has 4 divisors (see below), whose sum is σ = 2490236330400. Its totient is φ = 830078776798.

The previous prime is 1660157553569. The next prime is 1660157553619. The reversal of 1660157553598 is 8953557510661.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×1660157553598² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 415039388398 + ... + 415039388401.

It is an arithmetic number, because the mean of its divisors is an integer number (622559082600).

Almost surely, 2^{1660157553598} is an apocalyptic number.

1660157553598 is a deficient number, since it is larger than the sum of its proper divisors (830078776802).

1660157553598 is an equidigital number, since it uses as much as digits as its factorization.

1660157553598 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830078776801.

The product of its (nonzero) digits is 34020000, while the sum is 61.

The spelling of 1660157553598 in words is "one trillion, six hundred sixty billion, one hundred fifty-seven million, five hundred fifty-three thousand, five hundred ninety-eight".