66020450 has 12 divisors (see below), whose sum is σ = 122798130. Its totient is φ = 26408160.

The previous prime is 66020447. The next prime is 66020489. The reversal of 66020450 is 5402066.

It can be written as a sum of positive squares in 3 ways, for example, as 47761921 + 18258529 = 6911^2 + 4273^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 660155 + ... + 660254.

Almost surely, 2^66020450 is an apocalyptic number.

66020450 is a deficient number, since it is larger than the sum of its proper divisors (56777680).

66020450 is a wasteful number, since it uses less digits than its factorization.

66020450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320421 (or 1320416 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 66020450 is about 8125.2969176517. The cubic root of 66020450 is about 404.1657368219.

The spelling of 66020450 in words is "sixty-six million, twenty thousand, four hundred fifty".