67131690 has 64 divisors (see below), whose sum is σ = 166852224. Its totient is φ = 17273088.

The previous prime is 67131689. The next prime is 67131737. The reversal of 67131690 is 9613176.

It is a super-2 number, since 2×67131690² = 9013327604512200, which contains 22 as substring.

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, 218517 + ... + 218823.

It is an arithmetic number, because the mean of its divisors is an integer number (2607066).

Almost surely, 2^67131690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67131690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83426112).

67131690 is an abundant number, since it is smaller than the sum of its proper divisors (99720534).

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

67131690 is a wasteful number, since it uses less digits than its factorization.

67131690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551.

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 67131690 is about 8193.3930700290. The cubic root of 67131690 is about 406.4207380155.

The spelling of 67131690 in words is "sixty-seven million, one hundred thirty-one thousand, six hundred ninety".