1601664207 has 24 divisors (see below), whose sum is σ = 2522694528. Its totient is φ = 896032800.

The previous prime is 1601664199. The next prime is 1601664217. The reversal of 1601664207 is 7024661061.

It is not a de Polignac number, because 1601664207 - 2³ = 1601664199 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601664217) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 138019 + ... + 149172.

It is an arithmetic number, because the mean of its divisors is an integer number (105112272).

Almost surely, 2^1601664207 is an apocalyptic number.

1601664207 is a deficient number, since it is larger than the sum of its proper divisors (921030321).

1601664207 is a wasteful number, since it uses less digits than its factorization.

1601664207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287231 (or 287218 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 1601664207 is about 40020.7971809658. The cubic root of 1601664207 is about 1170.0124690029.

The spelling of 1601664207 in words is "one billion, six hundred one million, six hundred sixty-four thousand, two hundred seven".