100661650 has 48 divisors (see below), whose sum is σ = 195487488. Its totient is φ = 38520000.

The previous prime is 100661629. The next prime is 100661669. The reversal of 100661650 is 56166001.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 156229 + ... + 156871.

It is an arithmetic number, because the mean of its divisors is an integer number (4072656).

Almost surely, 2^100661650 is an apocalyptic number.

100661650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

100661650 is a deficient number, since it is larger than the sum of its proper divisors (94825838).

100661650 is a wasteful number, since it uses less digits than its factorization.

100661650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787 (or 782 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 100661650 is about 10033.0279577005. The cubic root of 100661650 is about 465.1803362656.

The spelling of 100661650 in words is "one hundred million, six hundred sixty-one thousand, six hundred fifty".