66770019 has 12 divisors (see below), whose sum is σ = 96797376. Its totient is φ = 44350992.

The previous prime is 66770003. The next prime is 66770023. The reversal of 66770019 is 91007766.

It is not a de Polignac number, because 66770019 - 2⁴ = 66770003 is a prime.

It is a super-2 number, since 2×66770019² = 8916470874520722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66770069) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10899 + ... + 15884.

It is an arithmetic number, because the mean of its divisors is an integer number (8066448).

Almost surely, 2^66770019 is an apocalyptic number.

66770019 is a deficient number, since it is larger than the sum of its proper divisors (30027357).

66770019 is a wasteful number, since it uses less digits than its factorization.

66770019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27066 (or 27063 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 36.

The square root of 66770019 is about 8171.2923702435. The cubic root of 66770019 is about 405.6895614403.

The spelling of 66770019 in words is "sixty-six million, seven hundred seventy thousand, nineteen".