2164661075 has 12 divisors (see below), whose sum is σ = 2692820208. Its totient is φ = 1726154400.

The previous prime is 2164661071. The next prime is 2164661099. The reversal of 2164661075 is 5701664612.

It is not a de Polignac number, because 2164661075 - 2² = 2164661071 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2164661071) 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, 131432 + ... + 146981.

It is an arithmetic number, because the mean of its divisors is an integer number (224401684).

Almost surely, 2^2164661075 is an apocalyptic number.

2164661075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2164661075 is a deficient number, since it is larger than the sum of its proper divisors (528159133).

2164661075 is a wasteful number, since it uses less digits than its factorization.

2164661075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278734 (or 278729 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 2164661075 is about 46525.9183144191. The cubic root of 2164661075 is about 1293.5899591215.

The spelling of 2164661075 in words is "two billion, one hundred sixty-four million, six hundred sixty-one thousand, seventy-five".