151666553 has 4 divisors (see below), whose sum is σ = 152632740. Its totient is φ = 150700368.

The previous prime is 151666523. The next prime is 151666583. The reversal of 151666553 is 355666151.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 355666151 = 269 ⋅1322179.

It is an interprime number because it is at equal distance from previous prime (151666523) and next prime (151666583).

It can be written as a sum of positive squares in 2 ways, for example, as 39476089 + 112190464 = 6283^2 + 10592^2 .

It is a cyclic number.

It is not a de Polignac number, because 151666553 - 2¹⁰ = 151665529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (151666523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 482858 + ... + 483171.

It is an arithmetic number, because the mean of its divisors is an integer number (38158185).

Almost surely, 2^151666553 is an apocalyptic number.

It is an amenable number.

151666553 is a deficient number, since it is larger than the sum of its proper divisors (966187).

151666553 is an equidigital number, since it uses as much as digits as its factorization.

151666553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 966186.

The product of its digits is 81000, while the sum is 38.

The square root of 151666553 is about 12315.2975197516. The cubic root of 151666553 is about 533.2897937981.

The spelling of 151666553 in words is "one hundred fifty-one million, six hundred sixty-six thousand, five hundred fifty-three".