661002167 has 8 divisors (see below), whose sum is σ = 769684896. Its totient is φ = 555882912.

The previous prime is 661002137. The next prime is 661002169. The reversal of 661002167 is 761200166.

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 661002167 - 2⁶ = 661002103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661002169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 890468 + ... + 891209.

It is an arithmetic number, because the mean of its divisors is an integer number (96210612).

Almost surely, 2^661002167 is an apocalyptic number.

661002167 is a deficient number, since it is larger than the sum of its proper divisors (108682729).

661002167 is a wasteful number, since it uses less digits than its factorization.

661002167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1781737.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 661002167 is about 25709.9624075960. The cubic root of 661002167 is about 871.0992257963.

The spelling of 661002167 in words is "six hundred sixty-one million, two thousand, one hundred sixty-seven".