2666462640 has 80 divisors (see below), whose sum is σ = 8341951200. Its totient is φ = 704526336.

The previous prime is 2666462639. The next prime is 2666462651. The reversal of 2666462640 is 462646662.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×2666462640² = 14220046021031539200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 2666462592 and 2666462601.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24805 + ... + 77124.

It is an arithmetic number, because the mean of its divisors is an integer number (104274390).

Almost surely, 2^2666462640 is an apocalyptic number.

2666462640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2666462640 is an abundant number, since it is smaller than the sum of its proper divisors (5675488560).

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

2666462640 is a wasteful number, since it uses less digits than its factorization.

2666462640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102054 (or 102048 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 42.

The square root of 2666462640 is about 51637.8024319393. The cubic root of 2666462640 is about 1386.6871817519.

The spelling of 2666462640 in words is "two billion, six hundred sixty-six million, four hundred sixty-two thousand, six hundred forty".