867666505 has 8 divisors (see below), whose sum is σ = 1055865024. Its totient is φ = 684356400.

The previous prime is 867666493. The next prime is 867666511. The reversal of 867666505 is 505666768.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 867666505 - 2⁷ = 867666377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1221711 + ... + 1222420.

It is an arithmetic number, because the mean of its divisors is an integer number (131983128).

Almost surely, 2^867666505 is an apocalyptic number.

It is an amenable number.

867666505 is a deficient number, since it is larger than the sum of its proper divisors (188198519).

867666505 is a wasteful number, since it uses less digits than its factorization.

867666505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2444207.

The product of its (nonzero) digits is 1814400, while the sum is 49.

The square root of 867666505 is about 29456.1794026313. The cubic root of 867666505 is about 953.7860016172.

The spelling of 867666505 in words is "eight hundred sixty-seven million, six hundred sixty-six thousand, five hundred five".