666767040 has 56 divisors (see below), whose sum is σ = 2116988400. Its totient is φ = 177804288.

The previous prime is 666767029. The next prime is 666767053. The reversal of 666767040 is 40767666.

666767040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 666766983 and 666767001.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 346315 + ... + 348234.

Almost surely, 2^666767040 is an apocalyptic number.

666767040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

666767040 is an abundant number, since it is smaller than the sum of its proper divisors (1450221360).

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

666767040 is a wasteful number, since it uses less digits than its factorization.

666767040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694569 (or 694559 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 42.

The square root of 666767040 is about 25821.8326228020. The cubic root of 666767040 is about 873.6243046278.

The spelling of 666767040 in words is "six hundred sixty-six million, seven hundred sixty-seven thousand, forty".