166440130461 has 12 divisors (see below), whose sum is σ = 262269296640. Its totient is φ = 100872806280.

The previous prime is 166440130427. The next prime is 166440130471. The reversal of 166440130461 is 164031044661.

166440130461 is a `hidden beast` number, since 1 + 6 + 64 + 4 + 0 + 130 + 461 = 666.

It is not a de Polignac number, because 166440130461 - 2²¹ = 166438033309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166440130471) 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, 840606621 + ... + 840606818.

It is an arithmetic number, because the mean of its divisors is an integer number (21855774720).

Almost surely, 2^166440130461 is an apocalyptic number.

166440130461 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

166440130461 is a deficient number, since it is larger than the sum of its proper divisors (95829166179).

166440130461 is a wasteful number, since it uses less digits than its factorization.

166440130461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1681213456 (or 1681213453 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The spelling of 166440130461 in words is "one hundred sixty-six billion, four hundred forty million, one hundred thirty thousand, four hundred sixty-one".