620166061 has 4 divisors (see below), whose sum is σ = 652806400. Its totient is φ = 587525724.

The previous prime is 620166059. The next prime is 620166083. The reversal of 620166061 is 160661026.

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 cyclic number.

It is not a de Polignac number, because 620166061 - 2¹ = 620166059 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 (620166011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16320141 + ... + 16320178.

It is an arithmetic number, because the mean of its divisors is an integer number (163201600).

Almost surely, 2^620166061 is an apocalyptic number.

It is an amenable number.

620166061 is a deficient number, since it is larger than the sum of its proper divisors (32640339).

620166061 is a wasteful number, since it uses less digits than its factorization.

620166061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32640338.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 620166061 is about 24903.1335578477. The cubic root of 620166061 is about 852.7780208495.

The spelling of 620166061 in words is "six hundred twenty million, one hundred sixty-six thousand, sixty-one".