16651506001 has 8 divisors (see below), whose sum is σ = 18987237864. Its totient is φ = 14466466560.

The previous prime is 16651505987. The next prime is 16651506037. The reversal of 16651506001 is 10060515661.

It can be written as a sum of positive squares in 4 ways, for example, as 6635776 + 16644870225 = 2576^2 + 129015^2 .

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

It is not a de Polignac number, because 16651506001 - 2²¹ = 16649408849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16651506041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37672870 + ... + 37673311.

It is an arithmetic number, because the mean of its divisors is an integer number (2373404733).

Almost surely, 2^16651506001 is an apocalyptic number.

It is an amenable number.

16651506001 is a deficient number, since it is larger than the sum of its proper divisors (2335731863).

16651506001 is a wasteful number, since it uses less digits than its factorization.

16651506001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75346211.

The product of its (nonzero) digits is 5400, while the sum is 31.

The spelling of 16651506001 in words is "sixteen billion, six hundred fifty-one million, five hundred six thousand, one".