2047400661 has 16 divisors (see below), whose sum is σ = 2968570944. Its totient is φ = 1249922304.

The previous prime is 2047400657. The next prime is 2047400669. The reversal of 2047400661 is 1660047402.

It is not a de Polignac number, because 2047400661 - 2² = 2047400657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2047400669) 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, 540615 + ... + 544388.

It is an arithmetic number, because the mean of its divisors is an integer number (185535684).

Almost surely, 2^2047400661 is an apocalyptic number.

It is an amenable number.

2047400661 is a deficient number, since it is larger than the sum of its proper divisors (921170283).

2047400661 is a wasteful number, since it uses less digits than its factorization.

2047400661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085060.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 2047400661 is about 45248.2116884192. The cubic root of 2047400661 is about 1269.7969504051.

The spelling of 2047400661 in words is "two billion, forty-seven million, four hundred thousand, six hundred sixty-one".