1025666955 has 40 divisors (see below), whose sum is σ = 1846798800. Its totient is φ = 544584384.

The previous prime is 1025666921. The next prime is 1025666959. The reversal of 1025666955 is 5596665201.

It is not a de Polignac number, because 1025666955 - 2¹⁵ = 1025634187 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1025666955.

It is not an unprimeable number, because it can be changed into a prime (1025666959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 87216 + ... + 98274.

It is an arithmetic number, because the mean of its divisors is an integer number (46169970).

Almost surely, 2^1025666955 is an apocalyptic number.

1025666955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1025666955 is a deficient number, since it is larger than the sum of its proper divisors (821131845).

1025666955 is a wasteful number, since it uses less digits than its factorization.

1025666955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11305 (or 11296 counting only the distinct ones).

The product of its (nonzero) digits is 486000, while the sum is 45.

The square root of 1025666955 is about 32026.0355804461. The cubic root of 1025666955 is about 1008.4834787382.

The spelling of 1025666955 in words is "one billion, twenty-five million, six hundred sixty-six thousand, nine hundred fifty-five".