651101506664 has 128 divisors (see below), whose sum is σ = 1430579335680. Its totient is φ = 272044032000.

The previous prime is 651101506661. The next prime is 651101506667. The reversal of 651101506664 is 466605101156.

It is an interprime number because it is at equal distance from previous prime (651101506661) and next prime (651101506667).

It is a super-3 number, since 3×651101506664³ (a number of 36 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (651101506661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 406683464 + ... + 406685064.

It is an arithmetic number, because the mean of its divisors is an integer number (11176401060).

Almost surely, 2^651101506664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 651101506664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (715289667840).

651101506664 is an abundant number, since it is smaller than the sum of its proper divisors (779477829016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

651101506664 is a wasteful number, since it uses less digits than its factorization.

651101506664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2451 (or 2447 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 41.

The spelling of 651101506664 in words is "six hundred fifty-one billion, one hundred one million, five hundred six thousand, six hundred sixty-four".