1066687538 has 8 divisors (see below), whose sum is σ = 1828607232. Its totient is φ = 457151796.

The previous prime is 1066687519. The next prime is 1066687571. The reversal of 1066687538 is 8357866601.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1066687538² = 2275644607449002888, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38095970 + ... + 38095997.

It is an arithmetic number, because the mean of its divisors is an integer number (228575904).

Almost surely, 2^1066687538 is an apocalyptic number.

1066687538 is a deficient number, since it is larger than the sum of its proper divisors (761919694).

1066687538 is an equidigital number, since it uses as much as digits as its factorization.

1066687538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76191976.

The product of its (nonzero) digits is 1451520, while the sum is 50.

The square root of 1066687538 is about 32660.1827612768. The cubic root of 1066687538 is about 1021.7525739394.

The spelling of 1066687538 in words is "one billion, sixty-six million, six hundred eighty-seven thousand, five hundred thirty-eight".