651066165601 has 4 divisors (see below), whose sum is σ = 651096436912. Its totient is φ = 651035894292.

The previous prime is 651066165599. The next prime is 651066165613. The reversal of 651066165601 is 106561660156.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 651066165601 - 2¹ = 651066165599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (651066165401) 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, 15103371 + ... + 15146416.

It is an arithmetic number, because the mean of its divisors is an integer number (162774109228).

Almost surely, 2^651066165601 is an apocalyptic number.

It is an amenable number.

651066165601 is a deficient number, since it is larger than the sum of its proper divisors (30271311).

651066165601 is a wasteful number, since it uses less digits than its factorization.

651066165601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30271310.

The product of its (nonzero) digits is 194400, while the sum is 43.

The spelling of 651066165601 in words is "six hundred fifty-one billion, sixty-six million, one hundred sixty-five thousand, six hundred one".