101665650 has 96 divisors (see below), whose sum is σ = 263483136. Its totient is φ = 25920000.

The previous prime is 101665649. The next prime is 101665667. The reversal of 101665650 is 56566101.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 375015 + ... + 375285.

It is an arithmetic number, because the mean of its divisors is an integer number (2744616).

Almost surely, 2^101665650 is an apocalyptic number.

101665650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 101665650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131741568).

101665650 is an abundant number, since it is smaller than the sum of its proper divisors (161817486).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

101665650 is a wasteful number, since it uses less digits than its factorization.

101665650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388 (or 383 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 101665650 is about 10082.9385597652. The cubic root of 101665650 is about 466.7217933743.

It can be divided in two parts, 1016 and 65650, that added together give a palindrome (66666).

The spelling of 101665650 in words is "one hundred one million, six hundred sixty-five thousand, six hundred fifty".