1660533501 has 8 divisors (see below), whose sum is σ = 2415321504. Its totient is φ = 1006383920.

The previous prime is 1660533491. The next prime is 1660533517. The reversal of 1660533501 is 1053350661.

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 1660533501 - 2⁷ = 1660533373 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660533541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25159566 + ... + 25159631.

It is an arithmetic number, because the mean of its divisors is an integer number (301915188).

Almost surely, 2^1660533501 is an apocalyptic number.

1660533501 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1660533501 is a deficient number, since it is larger than the sum of its proper divisors (754788003).

1660533501 is a wasteful number, since it uses less digits than its factorization.

1660533501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50319211.

The product of its (nonzero) digits is 8100, while the sum is 30.

The square root of 1660533501 is about 40749.6441824956. The cubic root of 1660533501 is about 1184.1749795129.

The spelling of 1660533501 in words is "one billion, six hundred sixty million, five hundred thirty-three thousand, five hundred one".