1662520101 has 16 divisors (see below), whose sum is σ = 2419268160. Its totient is φ = 1007147520.

The previous prime is 1662520073. The next prime is 1662520141. The reversal of 1662520101 is 1010252661.

It is not a de Polignac number, because 1662520101 - 2²⁵ = 1628965669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1662520141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75855 + ... + 95283.

It is an arithmetic number, because the mean of its divisors is an integer number (151204260).

Almost surely, 2^1662520101 is an apocalyptic number.

1662520101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1662520101 is a deficient number, since it is larger than the sum of its proper divisors (756748059).

1662520101 is a wasteful number, since it uses less digits than its factorization.

1662520101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22036.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 1662520101 is about 40774.0125692824. The cubic root of 1662520101 is about 1184.6470254940.

Adding to 1662520101 its reverse (1010252661), we get a palindrome (2672772762).

The spelling of 1662520101 in words is "one billion, six hundred sixty-two million, five hundred twenty thousand, one hundred one".