667677740 has 24 divisors (see below), whose sum is σ = 1403075520. Its totient is φ = 266889728.

The previous prime is 667677739. The next prime is 667677767. The reversal of 667677740 is 47776766.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21116 + ... + 42204.

It is an arithmetic number, because the mean of its divisors is an integer number (58461480).

Almost surely, 2^667677740 is an apocalyptic number.

It is an amenable number.

667677740 is an abundant number, since it is smaller than the sum of its proper divisors (735397780).

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

667677740 is a wasteful number, since it uses less digits than its factorization.

667677740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22681 (or 22679 counting only the distinct ones).

The product of its (nonzero) digits is 2074464, while the sum is 50.

The square root of 667677740 is about 25839.4609076892. The cubic root of 667677740 is about 874.0218686218.

The spelling of 667677740 in words is "six hundred sixty-seven million, six hundred seventy-seven thousand, seven hundred forty".