67687625 has 32 divisors (see below), whose sum is σ = 91282464. Its totient is φ = 49920000.

The previous prime is 67687619. The next prime is 67687639. The reversal of 67687625 is 52678676.

It can be written as a sum of positive squares in 16 ways, for example, as 18421264 + 49266361 = 4292^2 + 7019^2 .

It is not a de Polignac number, because 67687625 - 2²² = 63493321 is a prime.

It is a super-2 number, since 2×67687625² = 9163229156281250, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 67687625.

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, 112325 + ... + 112925.

It is an arithmetic number, because the mean of its divisors is an integer number (2852577).

Almost surely, 2^67687625 is an apocalyptic number.

It is an amenable number.

67687625 is a deficient number, since it is larger than the sum of its proper divisors (23594839).

67687625 is a wasteful number, since it uses less digits than its factorization.

67687625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686 (or 676 counting only the distinct ones).

The product of its digits is 846720, while the sum is 47.

The square root of 67687625 is about 8227.2489326627. The cubic root of 67687625 is about 407.5395472678.

The spelling of 67687625 in words is "sixty-seven million, six hundred eighty-seven thousand, six hundred twenty-five".