545726661 has 8 divisors (see below), whose sum is σ = 737884224. Its totient is φ = 358693440.

The previous prime is 545726659. The next prime is 545726663. The reversal of 545726661 is 166627545.

It is an interprime number because it is at equal distance from previous prime (545726659) and next prime (545726663).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 545726661 - 2¹ = 545726659 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545726663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1280836 + ... + 1281261.

It is an arithmetic number, because the mean of its divisors is an integer number (92235528).

Almost surely, 2^545726661 is an apocalyptic number.

It is an amenable number.

545726661 is a deficient number, since it is larger than the sum of its proper divisors (192157563).

545726661 is a wasteful number, since it uses less digits than its factorization.

545726661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2562171.

The product of its digits is 302400, while the sum is 42.

The square root of 545726661 is about 23360.7932442372. The cubic root of 545726661 is about 817.1937889351.

The spelling of 545726661 in words is "five hundred forty-five million, seven hundred twenty-six thousand, six hundred sixty-one".