661119067 has 8 divisors (see below), whose sum is σ = 756748512. Its totient is φ = 565785600.

The previous prime is 661119049. The next prime is 661119073. The reversal of 661119067 is 760911166.

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

It is a cyclic number.

It is not a de Polignac number, because 661119067 - 2²³ = 652730459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (661119967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69184 + ... + 78157.

It is an arithmetic number, because the mean of its divisors is an integer number (94593564).

Almost surely, 2^661119067 is an apocalyptic number.

661119067 is a deficient number, since it is larger than the sum of its proper divisors (95629445).

661119067 is a wasteful number, since it uses less digits than its factorization.

661119067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147989.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 661119067 is about 25712.2357448745. The cubic root of 661119067 is about 871.1505748448.

The spelling of 661119067 in words is "six hundred sixty-one million, one hundred nineteen thousand, sixty-seven".