201664603670 has 64 divisors (see below), whose sum is σ = 378533191680. Its totient is φ = 77286624000.

The previous prime is 201664603643. The next prime is 201664603697. The reversal of 201664603670 is 76306466102.

201664603670 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (201664603643) and next prime (201664603697).

It is a super-2 number, since 2×201664603670² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27839069 + ... + 27846311.

It is an arithmetic number, because the mean of its divisors is an integer number (5914581120).

Almost surely, 2^201664603670 is an apocalyptic number.

201664603670 is a deficient number, since it is larger than the sum of its proper divisors (176868588010).

201664603670 is a wasteful number, since it uses less digits than its factorization.

201664603670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8501.

The product of its (nonzero) digits is 217728, while the sum is 41.

The spelling of 201664603670 in words is "two hundred one billion, six hundred sixty-four million, six hundred three thousand, six hundred seventy".