1001656066 has 12 divisors (see below), whose sum is σ = 1552517766. Its totient is φ = 484671360.

The previous prime is 1001656043. The next prime is 1001656111. The reversal of 1001656066 is 6606561001.

It can be written as a sum of positive squares in only one way, i.e., 752679225 + 248976841 = 27435^2 + 15779^2 .

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 258655 + ... + 262498.

Almost surely, 2^1001656066 is an apocalyptic number.

1001656066 is a deficient number, since it is larger than the sum of its proper divisors (550861700).

1001656066 is an equidigital number, since it uses as much as digits as its factorization.

1001656066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521217 (or 521186 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 1001656066 is about 31648.9504723300. The cubic root of 1001656066 is about 1000.5517175518.

The spelling of 1001656066 in words is "one billion, one million, six hundred fifty-six thousand, sixty-six".