25015891966 has 16 divisors (see below), whose sum is σ = 40414371984. Its totient is φ = 11544629184.

The previous prime is 25015891961. The next prime is 25015892023. The reversal of 25015891966 is 66919851052.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25015891961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 247561 + ... + 333643.

It is an arithmetic number, because the mean of its divisors is an integer number (2525898249).

Almost surely, 2^25015891966 is an apocalyptic number.

25015891966 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

25015891966 is a deficient number, since it is larger than the sum of its proper divisors (15398480018).

25015891966 is a wasteful number, since it uses less digits than its factorization.

25015891966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97275.

The product of its (nonzero) digits is 1166400, while the sum is 52.

The spelling of 25015891966 in words is "twenty-five billion, fifteen million, eight hundred ninety-one thousand, nine hundred sixty-six".