1966525855 has 16 divisors (see below), whose sum is σ = 2703227904. Its totient is φ = 1345335840.

The previous prime is 1966525843. The next prime is 1966525861. The reversal of 1966525855 is 5585256691.

It is not a de Polignac number, because 1966525855 - 2⁹ = 1966525343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50097 + ... + 80266.

It is an arithmetic number, because the mean of its divisors is an integer number (168951744).

Almost surely, 2^1966525855 is an apocalyptic number.

1966525855 is a deficient number, since it is larger than the sum of its proper divisors (736702049).

1966525855 is a wasteful number, since it uses less digits than its factorization.

1966525855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130806.

The product of its digits is 3240000, while the sum is 52.

The square root of 1966525855 is about 44345.5280157988. The cubic root of 1966525855 is about 1252.8523354620.

The spelling of 1966525855 in words is "one billion, nine hundred sixty-six million, five hundred twenty-five thousand, eight hundred fifty-five".