1661498383 has 8 divisors (see below), whose sum is σ = 1759998240. Its totient is φ = 1563083520.

The previous prime is 1661498347. The next prime is 1661498393. The reversal of 1661498383 is 3838941661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1661498383 - 2¹⁷ = 1661367311 is a prime.

It is a super-2 number, since 2×1661498383² = 5521153753423229378, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1661498393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21478 + ... + 61516.

It is an arithmetic number, because the mean of its divisors is an integer number (219999780).

Almost surely, 2^1661498383 is an apocalyptic number.

1661498383 is a deficient number, since it is larger than the sum of its proper divisors (98499857).

1661498383 is a wasteful number, since it uses less digits than its factorization.

1661498383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42497.

The product of its digits is 746496, while the sum is 49.

The square root of 1661498383 is about 40761.4816094803. The cubic root of 1661498383 is about 1184.4042969554.

The spelling of 1661498383 in words is "one billion, six hundred sixty-one million, four hundred ninety-eight thousand, three hundred eighty-three".