1650666061 has 8 divisors (see below), whose sum is σ = 1801569024. Its totient is φ = 1499903520.

The previous prime is 1650666041. The next prime is 1650666067. The reversal of 1650666061 is 1606660561.

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 1650666061 - 2⁵ = 1650666029 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1650666061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1650666067) 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, 9720 + ... + 58273.

It is an arithmetic number, because the mean of its divisors is an integer number (225196128).

Almost surely, 2^1650666061 is an apocalyptic number.

1650666061 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1650666061 is a deficient number, since it is larger than the sum of its proper divisors (150902963).

1650666061 is a wasteful number, since it uses less digits than its factorization.

1650666061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70211.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 1650666061 is about 40628.3898401106. The cubic root of 1650666061 is about 1181.8247313948.

The spelling of 1650666061 in words is "one billion, six hundred fifty million, six hundred sixty-six thousand, sixty-one".