861669067 has 12 divisors (see below), whose sum is σ = 1004435760. Its totient is φ = 737036496.

The previous prime is 861669059. The next prime is 861669091. The reversal of 861669067 is 760966168.

861669067 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 861669067 - 2³ = 861669059 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 861669067.

It is not an unprimeable number, because it can be changed into a prime (861669097) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5809 + ... + 41917.

It is an arithmetic number, because the mean of its divisors is an integer number (83702980).

Almost surely, 2^861669067 is an apocalyptic number.

861669067 is a deficient number, since it is larger than the sum of its proper divisors (142766693).

861669067 is a wasteful number, since it uses less digits than its factorization.

861669067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36610 (or 36603 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 49.

The square root of 861669067 is about 29354.2001594320. The cubic root of 861669067 is about 951.5833492503.

The spelling of 861669067 in words is "eight hundred sixty-one million, six hundred sixty-nine thousand, sixty-seven".