403481661 has 16 divisors (see below), whose sum is σ = 587547648. Its totient is φ = 244257200.

The previous prime is 403481657. The next prime is 403481681. The reversal of 403481661 is 166184304.

It is not a de Polignac number, because 403481661 - 2² = 403481657 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (403481641) 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, 24796 + ... + 37706.

It is an arithmetic number, because the mean of its divisors is an integer number (36721728).

Almost surely, 2^403481661 is an apocalyptic number.

It is an amenable number.

403481661 is a deficient number, since it is larger than the sum of its proper divisors (184065987).

403481661 is a wasteful number, since it uses less digits than its factorization.

403481661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13872.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 403481661 is about 20086.8529391739. The cubic root of 403481661 is about 738.9378852223.

The spelling of 403481661 in words is "four hundred three million, four hundred eighty-one thousand, six hundred sixty-one".