67770020 has 48 divisors (see below), whose sum is σ = 145327728. Its totient is φ = 26542080.

The previous prime is 67770019. The next prime is 67770023. The reversal of 67770020 is 2007776.

67770020 = T₃₈₉ + T₃₉₀ + ... + T₇₇₄.

It can be written as a sum of positive squares in 8 ways, for example, as 19855936 + 47914084 = 4456^2 + 6922^2 .

It is a super-2 number, since 2×67770020² = 9185551221600800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (67770023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 351044 + ... + 351236.

It is an arithmetic number, because the mean of its divisors is an integer number (3027661).

Almost surely, 2^67770020 is an apocalyptic number.

It is an amenable number.

67770020 is an abundant number, since it is smaller than the sum of its proper divisors (77557708).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

67770020 is a wasteful number, since it uses less digits than its factorization.

67770020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480 (or 478 counting only the distinct ones).

The product of its (nonzero) digits is 4116, while the sum is 29.

The square root of 67770020 is about 8232.2548551415. The cubic root of 67770020 is about 407.7048438788.

Adding to 67770020 its reverse (2007776), we get a palindrome (69777796).

The spelling of 67770020 in words is "sixty-seven million, seven hundred seventy thousand, twenty".