1040666780 has 48 divisors (see below), whose sum is σ = 2255783040. Its totient is φ = 403073088.

The previous prime is 1040666777. The next prime is 1040666789. The reversal of 1040666780 is 876660401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1040666789) 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, 72479 + ... + 85641.

It is an arithmetic number, because the mean of its divisors is an integer number (46995480).

Almost surely, 2^1040666780 is an apocalyptic number.

1040666780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1040666780 is an abundant number, since it is smaller than the sum of its proper divisors (1215116260).

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

1040666780 is a wasteful number, since it uses less digits than its factorization.

1040666780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13298 (or 13296 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 1040666780 is about 32259.3673217563. The cubic root of 1040666780 is about 1013.3758814179.

The spelling of 1040666780 in words is "one billion, forty million, six hundred sixty-six thousand, seven hundred eighty".