2955618666 has 128 divisors (see below), whose sum is σ = 8818790400. Its totient is φ = 708626880.

The previous prime is 2955618661. The next prime is 2955618697. The reversal of 2955618666 is 6668165592.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (2955618661) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 26715 + ... + 81393.

It is an arithmetic number, because the mean of its divisors is an integer number (68896800).

Almost surely, 2^2955618666 is an apocalyptic number.

2955618666 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 2955618666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4409395200).

2955618666 is an abundant number, since it is smaller than the sum of its proper divisors (5863171734).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2955618666 is a wasteful number, since it uses less digits than its factorization.

2955618666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54721 (or 54715 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 54.

The square root of 2955618666 is about 54365.6018636785. The cubic root of 2955618666 is about 1435.1021008909.

The spelling of 2955618666 in words is "two billion, nine hundred fifty-five million, six hundred eighteen thousand, six hundred sixty-six".