2651466640 has 40 divisors (see below), whose sum is σ = 6233942520. Its totient is φ = 1048667136.

The previous prime is 2651466637. The next prime is 2651466683. The reversal of 2651466640 is 466641562.

It can be written as a sum of positive squares in 4 ways, for example, as 139051264 + 2512415376 = 11792^2 + 50124^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 2651466593 and 2651466602.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179079 + ... + 193318.

It is an arithmetic number, because the mean of its divisors is an integer number (155848563).

Almost surely, 2^2651466640 is an apocalyptic number.

2651466640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2651466640 is an abundant number, since it is smaller than the sum of its proper divisors (3582475880).

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

2651466640 is a wasteful number, since it uses less digits than its factorization.

2651466640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372499 (or 372493 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 40.

The square root of 2651466640 is about 51492.3940014445. The cubic root of 2651466640 is about 1384.0827492372.

The spelling of 2651466640 in words is "two billion, six hundred fifty-one million, four hundred sixty-six thousand, six hundred forty".