25780092066 has 48 divisors (see below), whose sum is σ = 56136412800. Its totient is φ = 8550418464.

The previous prime is 25780092011. The next prime is 25780092071. The reversal of 25780092066 is 66029008752.

It is a super-2 number, since 2×25780092066² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10482745 + ... + 10485203.

It is an arithmetic number, because the mean of its divisors is an integer number (1169508600).

Almost surely, 2^25780092066 is an apocalyptic number.

25780092066 is an abundant number, since it is smaller than the sum of its proper divisors (30356320734).

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

25780092066 is a wasteful number, since it uses less digits than its factorization.

25780092066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5143 (or 5140 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

It can be divided in two parts, 257800 and 92066, that added together give a triangular number (349866 = T₈₃₆).

The spelling of 25780092066 in words is "twenty-five billion, seven hundred eighty million, ninety-two thousand, sixty-six".