2406428661 has 80 divisors (see below), whose sum is σ = 4166095360. Its totient is φ = 1226897280.

The previous prime is 2406428657. The next prime is 2406428663. The reversal of 2406428661 is 1668246042.

It is not a de Polignac number, because 2406428661 - 2² = 2406428657 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2406428663) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2902395 + ... + 2903223.

It is an arithmetic number, because the mean of its divisors is an integer number (52076192).

Almost surely, 2^2406428661 is an apocalyptic number.

2406428661 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2406428661 is a deficient number, since it is larger than the sum of its proper divisors (1759666699).

2406428661 is an equidigital number, since it uses as much as digits as its factorization.

2406428661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 904 (or 883 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 39.

The square root of 2406428661 is about 49055.3632236069. The cubic root of 2406428661 is about 1340.0602670228.

It can be divided in two parts, 24064 and 28661, that added together give a palindrome (52725).

The spelling of 2406428661 in words is "two billion, four hundred six million, four hundred twenty-eight thousand, six hundred sixty-one".