667392054 has 48 divisors (see below), whose sum is σ = 1557024768. Its totient is φ = 190153488.

The previous prime is 667392029. The next prime is 667392083. The reversal of 667392054 is 450293766.

667392054 = T₅₆ + T₅₇ + ... + T₁₅₈₇.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 667391997 and 667392015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 109639 + ... + 115565.

It is an arithmetic number, because the mean of its divisors is an integer number (32438016).

Almost surely, 2^667392054 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 667392054, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (778512384).

667392054 is an abundant number, since it is smaller than the sum of its proper divisors (889632714).

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

667392054 is a wasteful number, since it uses less digits than its factorization.

667392054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6329 (or 6322 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 42.

The square root of 667392054 is about 25833.9322210151. The cubic root of 667392054 is about 873.8971919910.

The spelling of 667392054 in words is "six hundred sixty-seven million, three hundred ninety-two thousand, fifty-four".