5401546661 has 4 divisors (see below), whose sum is σ = 6173196192. Its totient is φ = 4629897132.

The previous prime is 5401546637. The next prime is 5401546673. The reversal of 5401546661 is 1666451045.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-5401546661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5401546621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 385824755 + ... + 385824768.

It is an arithmetic number, because the mean of its divisors is an integer number (1543299048).

Almost surely, 2^5401546661 is an apocalyptic number.

It is an amenable number.

5401546661 is a deficient number, since it is larger than the sum of its proper divisors (771649531).

5401546661 is an equidigital number, since it uses as much as digits as its factorization.

5401546661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771649530.

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 5401546661 is about 73495.2152252104. The cubic root of 5401546661 is about 1754.5781256127.

The spelling of 5401546661 in words is "five billion, four hundred one million, five hundred forty-six thousand, six hundred sixty-one".