624361661 has 8 divisors (see below), whose sum is σ = 778425024. Its totient is φ = 486515520.

The previous prime is 624361637. The next prime is 624361667. The reversal of 624361661 is 166163426.

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

It is a cyclic number.

It is not a de Polignac number, because 624361661 - 2⁶ = 624361597 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 (624361667) 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, 4054220 + ... + 4054373.

It is an arithmetic number, because the mean of its divisors is an integer number (97303128).

Almost surely, 2^624361661 is an apocalyptic number.

It is an amenable number.

624361661 is a deficient number, since it is larger than the sum of its proper divisors (154063363).

624361661 is a wasteful number, since it uses less digits than its factorization.

624361661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8108611.

The product of its digits is 31104, while the sum is 35.

The square root of 624361661 is about 24987.2299585208. The cubic root of 624361661 is about 854.6967956956.

The spelling of 624361661 in words is "six hundred twenty-four million, three hundred sixty-one thousand, six hundred sixty-one".