147775661 has 16 divisors (see below), whose sum is σ = 165604608. Its totient is φ = 130713600.

The previous prime is 147775651. The next prime is 147775703. The reversal of 147775661 is 166577741.

It is a happy number.

147775661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 147775661 - 2¹⁰ = 147774637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (147775601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99041 + ... + 100521.

It is an arithmetic number, because the mean of its divisors is an integer number (10350288).

Almost surely, 2^147775661 is an apocalyptic number.

147775661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

147775661 is a deficient number, since it is larger than the sum of its proper divisors (17828947).

147775661 is a wasteful number, since it uses less digits than its factorization.

147775661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1732.

The product of its digits is 246960, while the sum is 44.

The square root of 147775661 is about 12156.3012878095. The cubic root of 147775661 is about 528.6898469351.

The spelling of 147775661 in words is "one hundred forty-seven million, seven hundred seventy-five thousand, six hundred sixty-one".