166247552 has 16 divisors (see below), whose sum is σ = 331196550. Its totient is φ = 83123712.

The previous prime is 166247537. The next prime is 166247567. The reversal of 166247552 is 255742661.

It is an interprime number because it is at equal distance from previous prime (166247537) and next prime (166247567).

It can be written as a sum of positive squares in only one way, i.e., 157151296 + 9096256 = 12536^2 + 3016^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 649277 + ... + 649532.

Almost surely, 2^166247552 is an apocalyptic number.

It is an amenable number.

166247552 is a deficient number, since it is larger than the sum of its proper divisors (164948998).

166247552 is an equidigital number, since it uses as much as digits as its factorization.

166247552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1298823 (or 1298811 counting only the distinct ones).

The product of its digits is 100800, while the sum is 38.

The square root of 166247552 is about 12893.7020285099. The cubic root of 166247552 is about 549.8595255573.

The spelling of 166247552 in words is "one hundred sixty-six million, two hundred forty-seven thousand, five hundred fifty-two".