1566906940 has 12 divisors (see below), whose sum is σ = 3290504616. Its totient is φ = 626762768.

The previous prime is 1566906931. The next prime is 1566906941. The reversal of 1566906940 is 496096651.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1566906941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39172654 + ... + 39172693.

It is an arithmetic number, because the mean of its divisors is an integer number (274208718).

Almost surely, 2^1566906940 is an apocalyptic number.

1566906940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1566906940 is an abundant number, since it is smaller than the sum of its proper divisors (1723597676).

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

1566906940 is a wasteful number, since it uses less digits than its factorization.

1566906940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78345356 (or 78345354 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 46.

The square root of 1566906940 is about 39584.1753735000. The cubic root of 1566906940 is about 1161.4871285455.

It can be divided in two parts, 156 and 6906940, that added together give a palindrome (6907096).

The spelling of 1566906940 in words is "one billion, five hundred sixty-six million, nine hundred six thousand, nine hundred forty".