1066456631 has 16 divisors (see below), whose sum is σ = 1159411968. Its totient is φ = 977020800.

The previous prime is 1066456613. The next prime is 1066456639. The reversal of 1066456631 is 1366546601.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1066456631 is a prime.

It is a super-2 number, since 2×1066456631² = 2274659491607740322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066456639) 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, 224996 + ... + 229686.

It is an arithmetic number, because the mean of its divisors is an integer number (72463248).

Almost surely, 2^1066456631 is an apocalyptic number.

1066456631 is a deficient number, since it is larger than the sum of its proper divisors (92955337).

1066456631 is a wasteful number, since it uses less digits than its factorization.

1066456631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5062.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 1066456631 is about 32656.6475774841. The cubic root of 1066456631 is about 1021.6788419923.

The spelling of 1066456631 in words is "one billion, sixty-six million, four hundred fifty-six thousand, six hundred thirty-one".