1666622152 has 32 divisors (see below), whose sum is σ = 3367095480. Its totient is φ = 768798720.

The previous prime is 1666622137. The next prime is 1666622173. The reversal of 1666622152 is 2512266661.

It can be written as a sum of positive squares in 4 ways, for example, as 1642356676 + 24265476 = 40526^2 + 4926^2 .

It is a super-2 number, since 2×1666622152² = 5555258795074222208, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 283402 + ... + 289222.

Almost surely, 2^1666622152 is an apocalyptic number.

It is an amenable number.

1666622152 is an abundant number, since it is smaller than the sum of its proper divisors (1700473328).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1666622152 is a wasteful number, since it uses less digits than its factorization.

1666622152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8593 (or 8589 counting only the distinct ones).

The product of its digits is 51840, while the sum is 37.

The square root of 1666622152 is about 40824.2838516489. The cubic root of 1666622152 is about 1185.6205458081.

The spelling of 1666622152 in words is "one billion, six hundred sixty-six million, six hundred twenty-two thousand, one hundred fifty-two".