1667634474 has 64 divisors (see below), whose sum is σ = 3779291520. Its totient is φ = 486097920.

The previous prime is 1667634443. The next prime is 1667634509. The reversal of 1667634474 is 4744367661.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 213502 + ... + 221174.

It is an arithmetic number, because the mean of its divisors is an integer number (59051430).

Almost surely, 2^1667634474 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1667634474, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1889645760).

1667634474 is an abundant number, since it is smaller than the sum of its proper divisors (2111657046).

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

1667634474 is a wasteful number, since it uses less digits than its factorization.

1667634474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7815.

The product of its digits is 2032128, while the sum is 48.

The square root of 1667634474 is about 40836.6804968278. The cubic root of 1667634474 is about 1185.8605495850.

The spelling of 1667634474 in words is "one billion, six hundred sixty-seven million, six hundred thirty-four thousand, four hundred seventy-four".