166864707461 has 4 divisors (see below), whose sum is σ = 167207345952. Its totient is φ = 166522068972.

The previous prime is 166864707439. The next prime is 166864707481. The reversal of 166864707461 is 164707468661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 166864707461 - 2¹⁸ = 166864445317 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166864707397 and 166864707406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166864707421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171318515 + ... + 171319488.

It is an arithmetic number, because the mean of its divisors is an integer number (41801836488).

Almost surely, 2^166864707461 is an apocalyptic number.

It is an amenable number.

166864707461 is a deficient number, since it is larger than the sum of its proper divisors (342638491).

166864707461 is an equidigital number, since it uses as much as digits as its factorization.

166864707461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342638490.

The product of its (nonzero) digits is 8128512, while the sum is 56.

The spelling of 166864707461 in words is "one hundred sixty-six billion, eight hundred sixty-four million, seven hundred seven thousand, four hundred sixty-one".