6620402 has 4 divisors (see below), whose sum is σ = 9930606. Its totient is φ = 3310200.

The previous prime is 6620401. The next prime is 6620407. The reversal of 6620402 is 2040266.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 4713241 + 1907161 = 2171^2 + 1381^2 .

It is not an unprimeable number, because it can be changed into a prime (6620401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1655099 + ... + 1655102.

Almost surely, 2^6620402 is an apocalyptic number.

6620402 is a deficient number, since it is larger than the sum of its proper divisors (3310204).

6620402 is a wasteful number, since it uses less digits than its factorization.

6620402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3310203.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 6620402 is about 2573.0141857363. The cubic root of 6620402 is about 187.7708275875.

Adding to 6620402 its reverse (2040266), we get a palindrome (8660668).

The spelling of 6620402 in words is "six million, six hundred twenty thousand, four hundred two".