1066610402 has 48 divisors (see below), whose sum is σ = 1904580216. Its totient is φ = 444998400.

The previous prime is 1066610393. The next prime is 1066610417. The reversal of 1066610402 is 2040166601.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1045164241 + 21446161 = 32329^2 + 4631^2 .

It is a super-2 number, since 2×1066610402² = 2275315499309203208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 618902 + ... + 620622.

Almost surely, 2^1066610402 is an apocalyptic number.

1066610402 is a deficient number, since it is larger than the sum of its proper divisors (837969814).

1066610402 is a wasteful number, since it uses less digits than its factorization.

1066610402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1955 (or 1944 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 1066610402 is about 32659.0018524755. The cubic root of 1066610402 is about 1021.7279444819.

The spelling of 1066610402 in words is "one billion, sixty-six million, six hundred ten thousand, four hundred two".