1066387740 has 48 divisors (see below), whose sum is σ = 3257331840. Its totient is φ = 258518080.

The previous prime is 1066387733. The next prime is 1066387769. The reversal of 1066387740 is 477836601.

It is a super-2 number, since 2×1066387740² = 2274365624044615200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1066387692 and 1066387701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 807210 + ... + 808529.

It is an arithmetic number, because the mean of its divisors is an integer number (67861080).

Almost surely, 2^1066387740 is an apocalyptic number.

1066387740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1066387740 is an abundant number, since it is smaller than the sum of its proper divisors (2190944100).

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

1066387740 is a wasteful number, since it uses less digits than its factorization.

1066387740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1615762 (or 1615760 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 42.

The square root of 1066387740 is about 32655.5927828603. The cubic root of 1066387740 is about 1021.6568420376.

The spelling of 1066387740 in words is "one billion, sixty-six million, three hundred eighty-seven thousand, seven hundred forty".