667377400 has 24 divisors (see below), whose sum is σ = 1551652920. Its totient is φ = 266950880.

The previous prime is 667377383. The next prime is 667377401. The reversal of 667377400 is 4773766.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667377401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1668244 + ... + 1668643.

It is an arithmetic number, because the mean of its divisors is an integer number (64652205).

Almost surely, 2^667377400 is an apocalyptic number.

It is an amenable number.

667377400 is an abundant number, since it is smaller than the sum of its proper divisors (884275520).

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

667377400 is a wasteful number, since it uses less digits than its factorization.

667377400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3336903 (or 3336894 counting only the distinct ones).

The product of its (nonzero) digits is 148176, while the sum is 40.

The square root of 667377400 is about 25833.6486002268. The cubic root of 667377400 is about 873.8907958589.

The spelling of 667377400 in words is "six hundred sixty-seven million, three hundred seventy-seven thousand, four hundred".