201661427246 has 8 divisors (see below), whose sum is σ = 302721479280. Its totient is φ = 100754267488.

The previous prime is 201661427221. The next prime is 201661427329. The reversal of 201661427246 is 642724166102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×201661427246² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38219771 + ... + 38225046.

It is an arithmetic number, because the mean of its divisors is an integer number (37840184910).

Almost surely, 2^201661427246 is an apocalyptic number.

201661427246 is a deficient number, since it is larger than the sum of its proper divisors (101060052034).

201661427246 is a wasteful number, since it uses less digits than its factorization.

201661427246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76446138.

The product of its (nonzero) digits is 193536, while the sum is 41.

The spelling of 201661427246 in words is "two hundred one billion, six hundred sixty-one million, four hundred twenty-seven thousand, two hundred forty-six".