1066637427 has 16 divisors (see below), whose sum is σ = 1458350880. Its totient is φ = 693043200.

The previous prime is 1066637389. The next prime is 1066637441. The reversal of 1066637427 is 7247366601.

It is a happy number.

It is not a de Polignac number, because 1066637427 - 2¹¹ = 1066635379 is a prime.

It is a super-2 number, since 2×1066637427² = 2275430801354360658, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1066637227) 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, 135027 + ... + 142707.

It is an arithmetic number, because the mean of its divisors is an integer number (91146930).

Almost surely, 2^1066637427 is an apocalyptic number.

1066637427 is a deficient number, since it is larger than the sum of its proper divisors (391713453).

1066637427 is a wasteful number, since it uses less digits than its factorization.

1066637427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8854.

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

The square root of 1066637427 is about 32659.4155948939. The cubic root of 1066637427 is about 1021.7365736759.

The spelling of 1066637427 in words is "one billion, sixty-six million, six hundred thirty-seven thousand, four hundred twenty-seven".