620066655 has 48 divisors (see below), whose sum is σ = 1172196480. Its totient is φ = 301377024.

The previous prime is 620066651. The next prime is 620066677. The reversal of 620066655 is 556660026.

It is not a de Polignac number, because 620066655 - 2² = 620066651 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620066651) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 39507 + ... + 52923.

It is an arithmetic number, because the mean of its divisors is an integer number (24420760).

Almost surely, 2^620066655 is an apocalyptic number.

620066655 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

620066655 is a deficient number, since it is larger than the sum of its proper divisors (552129825).

620066655 is a wasteful number, since it uses less digits than its factorization.

620066655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13520 (or 13517 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 620066655 is about 24901.1376246147. The cubic root of 620066655 is about 852.7324546767.

The spelling of 620066655 in words is "six hundred twenty million, sixty-six thousand, six hundred fifty-five".