666701340 has 48 divisors (see below), whose sum is σ = 1868354208. Its totient is φ = 177635584.

The previous prime is 666701339. The next prime is 666701341. The reversal of 666701340 is 43107666.

It is an interprime number because it is at equal distance from previous prime (666701339) and next prime (666701341).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666701341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78334 + ... + 86426.

It is an arithmetic number, because the mean of its divisors is an integer number (38924046).

Almost surely, 2^666701340 is an apocalyptic number.

666701340 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

666701340 is an abundant number, since it is smaller than the sum of its proper divisors (1201652868).

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

666701340 is a wasteful number, since it uses less digits than its factorization.

666701340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9478 (or 9476 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 666701340 is about 25820.5604121986. The cubic root of 666701340 is about 873.5956094471.

The spelling of 666701340 in words is "six hundred sixty-six million, seven hundred one thousand, three hundred forty".