1661050701 has 12 divisors (see below), whose sum is σ = 2405564928. Its totient is φ = 1104473544.

The previous prime is 1661050691. The next prime is 1661050757. The reversal of 1661050701 is 1070501661.

It is not a de Polignac number, because 1661050701 - 2⁹ = 1661050189 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 (1661050771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 237495 + ... + 244388.

It is an arithmetic number, because the mean of its divisors is an integer number (200463744).

Almost surely, 2^1661050701 is an apocalyptic number.

It is an amenable number.

1661050701 is a deficient number, since it is larger than the sum of its proper divisors (744514227).

1661050701 is a wasteful number, since it uses less digits than its factorization.

1661050701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482272 (or 482269 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 1661050701 is about 40755.9897561082. The cubic root of 1661050701 is about 1184.2979102304.

The spelling of 1661050701 in words is "one billion, six hundred sixty-one million, fifty thousand, seven hundred one".