401660604601 has 4 divisors (see below), whose sum is σ = 401667405604. Its totient is φ = 401653803600.

The previous prime is 401660604547. The next prime is 401660604623. The reversal of 401660604601 is 106406066104.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 364996014201 + 36664590400 = 604149^2 + 191480^2 .

It is a cyclic number.

It is not a de Polignac number, because 401660604601 - 2¹³ = 401660596409 is a prime.

It is a super-2 number, since 2×401660604601² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401660604661) 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, 3311130 + ... + 3430291.

It is an arithmetic number, because the mean of its divisors is an integer number (100416851401).

Almost surely, 2^401660604601 is an apocalyptic number.

It is an amenable number.

401660604601 is a deficient number, since it is larger than the sum of its proper divisors (6801003).

401660604601 is an equidigital number, since it uses as much as digits as its factorization.

401660604601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6801002.

The product of its (nonzero) digits is 20736, while the sum is 34.

The spelling of 401660604601 in words is "four hundred one billion, six hundred sixty million, six hundred four thousand, six hundred one".