661012167 has 16 divisors (see below), whose sum is σ = 921996000. Its totient is φ = 420693504.

The previous prime is 661012133. The next prime is 661012169. The reversal of 661012167 is 761210166.

It is not a de Polignac number, because 661012167 - 2²⁴ = 644234951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661012169) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34942 + ... + 50427.

It is an arithmetic number, because the mean of its divisors is an integer number (57624750).

Almost surely, 2^661012167 is an apocalyptic number.

661012167 is a deficient number, since it is larger than the sum of its proper divisors (260983833).

661012167 is a wasteful number, since it uses less digits than its factorization.

661012167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85490.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 661012167 is about 25710.1568840021. The cubic root of 661012167 is about 871.1036185950.

The spelling of 661012167 in words is "six hundred sixty-one million, twelve thousand, one hundred sixty-seven".