866199054 has 32 divisors (see below), whose sum is σ = 1990160640. Its totient is φ = 246200832.

The previous prime is 866199029. The next prime is 866199073. The reversal of 866199054 is 450991668.

It is a junction number, because it is equal to n+sod(n) for n = 866198994 and 866199012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45324 + ... + 61535.

It is an arithmetic number, because the mean of its divisors is an integer number (62192520).

Almost surely, 2^866199054 is an apocalyptic number.

866199054 is an abundant number, since it is smaller than the sum of its proper divisors (1123961586).

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

866199054 is a wasteful number, since it uses less digits than its factorization.

866199054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107064.

The product of its (nonzero) digits is 466560, while the sum is 48.

The square root of 866199054 is about 29431.2598099368. The cubic root of 866199054 is about 953.2479976702.

The spelling of 866199054 in words is "eight hundred sixty-six million, one hundred ninety-nine thousand, fifty-four".