2640347466 has 16 divisors (see below), whose sum is σ = 5281618944. Its totient is φ = 879961824.

The previous prime is 2640347461. The next prime is 2640347471. The reversal of 2640347466 is 6647430462.

It is an interprime number because it is at equal distance from previous prime (2640347461) and next prime (2640347471).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2640347461) 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, 1911 + ... + 72693.

It is an arithmetic number, because the mean of its divisors is an integer number (330101184).

Almost surely, 2^2640347466 is an apocalyptic number.

2640347466 is an abundant number, since it is smaller than the sum of its proper divisors (2641271478).

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

2640347466 is a wasteful number, since it uses less digits than its factorization.

2640347466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77005.

The product of its (nonzero) digits is 580608, while the sum is 42.

The square root of 2640347466 is about 51384.3114773371. The cubic root of 2640347466 is about 1382.1452781180.

The spelling of 2640347466 in words is "two billion, six hundred forty million, three hundred forty-seven thousand, four hundred sixty-six".