666962840 has 32 divisors (see below), whose sum is σ = 1501578000. Its totient is φ = 266623104.

The previous prime is 666962767. The next prime is 666962843. The reversal of 666962840 is 48269666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666962843) by changing a digit.

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, 78731 + ... + 86789.

Almost surely, 2^666962840 is an apocalyptic number.

It is an amenable number.

666962840 is an abundant number, since it is smaller than the sum of its proper divisors (834615160).

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

666962840 is a wasteful number, since it uses less digits than its factorization.

666962840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10139 (or 10135 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 47.

The square root of 666962840 is about 25825.6237097964. The cubic root of 666962840 is about 873.7098112028.

The spelling of 666962840 in words is "six hundred sixty-six million, nine hundred sixty-two thousand, eight hundred forty".