2662547661 has 12 divisors (see below), whose sum is σ = 3881846592. Its totient is φ = 1758442056.

The previous prime is 2662547647. The next prime is 2662547663. The reversal of 2662547661 is 1667452662.

2662547661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2662547661 - 2⁷ = 2662547533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2662547663) 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, 1381461 + ... + 1383386.

It is an arithmetic number, because the mean of its divisors is an integer number (323487216).

Almost surely, 2^2662547661 is an apocalyptic number.

It is an amenable number.

2662547661 is a deficient number, since it is larger than the sum of its proper divisors (1219298931).

2662547661 is a wasteful number, since it uses less digits than its factorization.

2662547661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2764960 (or 2764957 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The square root of 2662547661 is about 51599.8804359080. The cubic root of 2662547661 is about 1386.0081910150.

The spelling of 2662547661 in words is "two billion, six hundred sixty-two million, five hundred forty-seven thousand, six hundred sixty-one".